Analysis, Design And Optimization Of Energy Efficient Protocols For Wireless Sensor Networks

Ph.DDOCTOR OF PHILOSOPH

The diversity of flower-visiting insects in the gardens of English country houses

Flower-visiting insects provide essential pollination services, ensuring both global food security and the continuity of wild plants. Recently documented declines in pollinators give cause for concern. Identifying previously unappreciated habitats that support diverse assemblages of these insects is an essential first step in mitigating further losses. This study evaluates, for the first time, the role that large English country-house gardens play in supporting flower visitors within expanses of intensively farmed agricultural land. Focussing on 17 properties in lowland Central England, the results show that these novel ecosystems are important sites for hoverflies, bees and butterflies. In 2010 almost 10,000 flower-visitors from 174 species were recorded Hoverflies were the only group to show a significant difference in species richness across the sites. An important characteristic of these rural gardens is the high diversity of flowering plants available. More than a fifth of the world's plant families were represented, of which approximately 68% were non-native. The results showed that flower visitors did not prefer native plants over aliens, and that the dominance by aliens was no barrier for extensive use by the insects present. Both the species richness and abundance of flower visitors increased as plant richness increased. The study revealed that half of all insect-plant interaction networks examined exhibited a nested structure, a common feature of natural environments that has not previously been assessed in rural gardens. In addition to flower resources influencing insect species richness, landscape-scale effects were also significant. Insect groups responded differently to components in the landscape according to the time of year and the spatial scale considered. Bumblebees exhibited the greatest response to landscape factors and did so at larger scales than other groups. The deployment of commercial trap-nests for solitary cavity-nesting red mason bees in walled gardens revealed new insights into the differential mortality suffered by male and female progeny. Female offspring were found to be disproportionately affected by a combination of development and parasitism losses. This finding suggests that effective mitigation strategies are needed before this species can be considered for use as a managed-pollinator. Further research assessing the benefits crops such as oilseed rape derive from the presence of insects in nearby rural gardens would be a useful addition to this work. Overall, the gardens of English country-houses emerge as sites of important natural as well as cultural heritage

OPAL Community Environment Report

The Open Air Laboratories network, or OPAL, as it quickly became known, was launched in 2007 following a successful application to the Big Lottery Fund It was the first time that Big Lottery funding on this scale had been awarded to academic institutions. The University of Central Lancashire led by Dr Mark Toogood was responsible for understanding public engagement with OPAL. The Open Air Laboratories (OPAL)network is a nationwide partnership comprising of ten universities and five organisations with grants awarded totalling £14.4 million. • Over half a million people have participated in the OPAL programme. OPAL activities are carried out by people of all ages, backgrounds and abilities, including 10,000 people in ‘hard to reach’ communities. • OPAL opens people’s eyes to the natural world. Nearly half (44%) of OPAL survey participants said that this was the first time that they had carried out a nature survey. 90% of participants have learnt something new. • OPAL has the ability to change people’s behaviour. Almost half (43%) of respondents said OPAL had changed the way they thought about the environment and more than a third (37%) said they will change their behaviour towards it. • In addition to raising environmental awareness, OPAL also improves personal well-being by motivating people to spend time outdoors doing something positive, while connecting with people and nature

Social networks for lonely objects

Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2010.Cataloged from PDF version of thesis.Includes bibliographical references (p. 115-119).Visions of ubiquitous computing describe a network of devices that quietly supports human goals, but this may also add complexity to an already frustrating relationship between humans and their electronic objects. As we move from vision to reality, there is an opportunity to rethink how we interact with our objects and networks of objects, and close the communication gap between man and machine. 'This thesis defines social and super-mechanical affordances for products which may consist of many physical and digital objects. These new objects will not look like stripped-down contemporary computers, but augmented ordinary objects that are focused on input and output, exposed on Twitter. Apps in the cloud use Twitter to marshall the appropriate objects to execute human tasks. Using a social network as transport allows apps and their owners to manage a large network of computing objects with the same constructs that we use to manage many human relationships. From this direction, we take a step toward a consumer-amenable implementation of ubiquitous computing.by John Anthony Kestner.S.M

Training Data Generation Framework For Machine-Learning Based Classifiers

In this thesis, we propose a new framework for the generation of training data for machine learning techniques used for classification in communications applications. Machine learning-based signal classifiers do not generalize well when training data does not describe the underlying probability distribution of real signals. The simplest way to accomplish statistical similarity between training and testing data is to synthesize training data passed through a permutation of plausible forms of noise. To accomplish this, a framework is proposed that implements arbitrary channel conditions and baseband signals. A dataset generated using the framework is considered, and is shown to be appropriately sized by having $11\%$ lower entropy than state-of-the-art datasets. Furthermore, unsupervised domain adaptation can allow for powerful generalized training via deep feature transforms on unlabeled evaluation-time signals. A novel Deep Reconstruction-Classification Network (DRCN) application is introduced, which attempts to maintain near-peak signal classification accuracy despite dataset bias, or perturbations on testing data unforeseen in training. Together, feature transforms and diverse training data generated from the proposed framework, teaching a range of plausible noise, can train a deep neural net to classify signals well in many real-world scenarios despite unforeseen perturbations

The assessment report of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services on pollinators, pollination and food production

The thematic assessment of pollinators, pollination and food production carried out under the auspices of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services aims to assess animal pollination as a regulating ecosystem service underpinning food production in the context of its contribution to nature’s gifts to people and supporting a good quality of life. To achieve this, it focuses on the role of native and managed pollinators, the status and trends of pollinators and pollinator-plant networks and pollination, drivers of change, impacts on human well-being, food production in response to pollination declines and deficits and the effectiveness of responses

Animal Umwelten in a Changing world: Zoosemiotic Perspectives

The book raises semiotic questions of human–animal relations: what is the semiotic character of different species, how humans endow animals with meaning, and how animal sign exchange and communication has coped with environmental change. The book takes a zoosemiotic approach and considers different species as being integrated with the environment via their specific umwelt or subjective perceptual world. The authors elaborate J. v. Uexküll’s concept of umwelt to make it applicable for analyzing complex and dynamical interactions between animals, humans, environment and culture. The opening chapters of the book present a framework for philosophical, historical, epistemological and methodological aspects of zoosemiotic research. These initial considerations are followed by specific case studies: on human–animal interactions in zoological gardens, communication in the teams of visually disabled persons and guiding dogs, semiotics of the animal condition in philosophy, historical changes in the role of animals in human households, the semiotics of predation, cultural perception of novel species, and other topics. The authors belong to the research group in zoosemiotics and human–animal relations based in the Department of Semiotics at the University of Tartu in Estonia, and in the University of Stavanger in Norway

The influences of the just-in-time social cloud on real world decisions

Thesis (Ph. D.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2012.Cataloged from PDF version of thesis.Includes bibliographical references (p. 209-224).People have intertemporal biases towards choices that result in immediate gratification versus delayed rewards. The social context can accentuate or downplay preferences towards virtues or vices when making choices in the moment. Especially in our modern world where social networks are virtually accessible at anytime, from anywhere, how our day-today decisions are affected by the "always-on" connection to our social networks via mobile devices is an open question. By understanding the dimensions of these social forces, we can utilize the just-in-time social cloud to nudge people towards decisions that have long term benefits for health and finances, while counterbalancing the forces of the marketers that trigger our impulses towards immediate temptations that we may regret later. This work presents an empirical inquiry into the effect of just-in-time social influences in human decision-making. In order to understand these effects and discover their parameters, I design and deploy real-world experiments with the just-in-time social cloud using mobile phones as platforms for just-in-time social influence. The Open Transaction Network forms the basis of generating just-in-time social networks based on the transactions shared by people in the context of commerce. The Open Transaction Network is extended to several systems to conduct real-world experiments involving real choices. By augmenting mobile commerce applications with just-in-time social networks, I design a mobile commerce environment that can socially influence our just-in-time choices. The Open Credit Card Application Framework augments existing methods of payment by using transactions as triggers to enable mobile applications that facilitate just-in-time decisions or reflections. Friends within communities show significant similarity in their hourly transaction behaviors. Varying manifestations of the just-in-time social cloud (individual friends, groups of friends and popularity information) can be used to nudge people's choices in the dimensions of taste, price and time as they decide.by Kwan Hong Lee.Ph.D

Animal Umwelten in a Changing world: Zoosemiotic Perspectives

The book raises semiotic questions of human–animal relations: what is the semiotic character of different species, how humans endow animals with meaning, and how animal sign exchange and communication has coped with environmental change. The book takes a zoosemiotic approach and considers different species as being integrated with the environment via their specific umwelt or subjective perceptual world. The authors elaborate J. v. Uexküll’s concept of umwelt to make it applicable for analyzing complex and dynamical interactions between animals, humans, environment and culture. The opening chapters of the book present a framework for philosophical, historical, epistemological and methodological aspects of zoosemiotic research. These initial considerations are followed by specific case studies: on human–animal interactions in zoological gardens, communication in the teams of visually disabled persons and guiding dogs, semiotics of the animal condition in philosophy, historical changes in the role of animals in human households, the semiotics of predation, cultural perception of novel species, and other topics. The authors belong to the research group in zoosemiotics and human–animal relations based in the Department of Semiotics at the University of Tartu in Estonia, and in the University of Stavanger in Norway