6,730 research outputs found

    Develop Sign Painting Skills with a mentor Bill Warren (Summer 2022)

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    Cole Russell is the Manager of Printing Services in Printing and Graphic Design Services. He has been on staff at the University of Mississippi since December 1, 2011.https://egrove.olemiss.edu/staff_res/1003/thumbnail.jp

    The crisis at Caesarea Philippi

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    This item was digitized by the Internet Archive. Thesis (M.A.)--Boston Universityhttps://archive.org/details/thecrisisatcaesa00col

    Detecting Feeding and Estimating the Energetic Costs of Diving in California Sea Lions (Zalophus californianus) Using 3-Axis Accelerometers

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    Knowledge of when animals feed and the energetic costs of foraging is key to understanding their foraging ecology and energetic trade-offs. Despite this importance, our ability to collect these data in marine mammals remains limited. In this thesis, I address knowledge gaps in both feeding detection and fine-scale diving energetic costs in a model species, the California sea lion (Zalophus californianus). I first developed and tested an analysis method to accurately detect prey capture using 3-axis accelerometers mounted on the head and back of two trained sea lions. An acceleration signal pattern isolated from a ‘training’ subset of synced video and acceleration data was used to build a feeding detector. In blind trials on the remaining data, this detector accurately parsed true feeding from other motions (91-100% true positive rate, 0-4.8% false positive rate), improving upon similar published methods. In a second study, I used depth and acceleration data to estimate the changing body density of 8 wild sea lions throughout dives, and used those data to calculate each sea lion’s energetic expenditure during descent and ascent at fine temporal scales. Energy expenditure patterns closely followed the influence of buoyancy changes with depth. Importantly, sea lions used more energy per second but less energy per meter as dive depth increased, revealing high costs of deep diving. Combined, these studies further our understanding of California sea lion foraging ecology and provide new methods to aid similar future studies

    Defeat data poisoning attacks on facial recognition applications

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    In the modern era, facial photos are used for a wide array of applications, from logging into a smartphone to bragging about a weekend getaway. With the vast amount of use cases for facial images, adversaries will attack these applications for profit. This dissertation focuses on two major applications of facial photos: facial authentication and deepfakes. Facial authentication has become increasingly popular on personal devices. Due to the ease of use, it has great potential to be widely deployed for web-service authentication in the near future in which people can easily log on to online accounts from different devices without memorizing lengthy passwords. However, the growing number of attacks targeting machine learning, especially Deep Neural Networks (DNN), which is commonly used for facial recognition, imposes big challenges on the successful roll-out of such web-service facial authentication. We demonstrate a new data poisoning attack, called replacement data poisoning, which does not require the adversary to have any knowledge of the server-side and simply needs a handful of malicious photo injections to enable an attacker to impersonate the victim in existing facial authentication systems. We then propose a novel defensive approach called DEFEAT that leverages deep learning techniques to automatically detect such attacks. Our experiments using real-world datasets achieve a detection accuracy of over 90 percent. Deepfakes target specific individuals to cause shame or misinformation. With the spread of fake news, deepfakes have become incredibly prevalent in recent years. With deepfakes, an adversary could have photographic or even video-graphic \proof" of someone, such as a politician, committing a devious act or saying untrue words. Our deepfake work consists of two parts. First, we propose a label ipping data poisoning attack targeting deepfake detectors. With over a 99 percent poison success rate in most cases, this attack demonstrates the devastating effects a data poisoning attack can have on deepfake detectors and how important a need to defend against this assault is. Our second contribution revolves around defending deepfake detectors from such an attack. We propose several defense strategies, most notably a convolutional neural network (CNN) based strategy to detect poisoned images. Our CNN-based approach achieves a greater than 98 percent poison detection rate while keeping the number of false positives to a minimum with a precision rate of over 99 percent in most cases.Includes bibliographical references

    Regional Economic Integration

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    In lieu of an abstract, below is the essay\u27s first paragraph.Regional Economic Integration can best be defined as an agreement between groups of countries in a geographic region, to reduce and ultimately remove tariff and non-tariff barriers to the free flow of goods, services, and factors of production between each other

    Smart Kettlebell

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    The purpose of design team 08’s senior design project is to create and implement a workout device that will be able to calculate the caloric expenditure, repetitions, and length of a workout. Once the duration of a workout is completed, the user metrics will be communicated from the kettlebell system to a user application via Bluetooth. The caloric expenditure will be used using the data that is provided from the accelerometer. The duration of the workout will be controlled using a push button that is connected to the kettlebell system that will allow for the start and stop of a workout. A repetition will be calculated using the accelerometer in which a count will occur once a threshold acceleration is reached. In addition to the features stated above, the system will be recharged wirelessly through inductive charging. Overall, this product will be quite useful for its user as it will be able to keep track of workout metrics and accurately measure the caloric expenditure throughout the duration of a workout

    Cultural competence: a key component for training global citizens

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    [EN] As globalization continues to make cross-cultural interactions more of a reality, the need to develop the cultural competence of students and staff is imperative. The University of Sydney has included cultural competence in its 2016-20 strategic plan, necessitating the embedding of cultural competence across all functions of the University. The National Centre for Cultural Competence (NCCC) at The University of Sydney was created to lead the thinking on cultural competence, which includes creating teaching and learning resources to guide University students and staff on their cultural competence journey. In this paper, we discuss a cultural competence seminar developed and delivered by the NCCC to students participating in a broader program designed to educate and prepare them to be global citizens. We will examine the efficacy of our approach to cultural competence training with this particular cohort of students. http://ocs.editorial.upv.es/index.php/HEAD/HEAD18Mchugh-Cole, A.; Russell-Mundine, G.; Simons, R. (2018). Cultural competence: a key component for training global citizens. Editorial Universitat Politècnica de València. 777-784. https://doi.org/10.4995/HEAD18.2018.8083OCS77778

    Social capital and political participation: understanding the dynamics of young people's political disengagement in contemporary Britain

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    Only 37 per cent of young people voted at the 2005 British General Election, seemingly confirming the oft-cited view that this generation is becoming increasingly disconnected from the political process. Results from a nationwide survey however, indicate that their withdrawal from formal politics is more a result of their scepticism of the way the political system operates, than apathy. Furthermore, they are diverse in their political (dis)engagement. Results from an examination of the relative effects of socio-economic location and social capital are inconclusive, although the data indicate that government social policy aimed at mobilising social capital and addressing socio-economic issues may increase civic engagement

    Social capital and political participation: understanding the dynamics of young people's political disengagement in contemporary Britain

    Get PDF
    Only 37 per cent of young people voted at the 2005 British General Election, seemingly confirming the oft-cited view that this generation is becoming increasingly disconnected from the political process. Results from a nationwide survey however, indicate that their withdrawal from formal politics is more a result of their scepticism of the way the political system operates, than apathy. Furthermore, they are diverse in their political (dis)engagement. Results from an examination of the relative effects of socio-economic location and social capital are inconclusive, although the data indicate that government social policy aimed at mobilising social capital and addressing socio-economic issues may increase civic engagement
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