5,481 research outputs found

    VIVE3D: Viewpoint-Independent Video Editing using 3D-Aware GANs

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    We introduce VIVE3D, a novel approach that extends the capabilities of image-based 3D GANs to video editing and is able to represent the input video in an identity-preserving and temporally consistent way. We propose two new building blocks. First, we introduce a novel GAN inversion technique specifically tailored to 3D GANs by jointly embedding multiple frames and optimizing for the camera parameters. Second, besides traditional semantic face edits (e.g. for age and expression), we are the first to demonstrate edits that show novel views of the head enabled by the inherent properties of 3D GANs and our optical flow-guided compositing technique to combine the head with the background video. Our experiments demonstrate that VIVE3D generates high-fidelity face edits at consistent quality from a range of camera viewpoints which are composited with the original video in a temporally and spatially consistent manner.Comment: CVPR 2023. Project webpage and video available at http://afruehstueck.github.io/vive3

    Review of Methodologies to Assess Bridge Safety During and After Floods

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    This report summarizes a review of technologies used to monitor bridge scour with an emphasis on techniques appropriate for testing during and immediately after design flood conditions. The goal of this study is to identify potential technologies and strategies for Illinois Department of Transportation that may be used to enhance the reliability of bridge safety monitoring during floods from local to state levels. The research team conducted a literature review of technologies that have been explored by state departments of transportation (DOTs) and national agencies as well as state-of-the-art technologies that have not been extensively employed by DOTs. This review included informational interviews with representatives from DOTs and relevant industry organizations. Recommendations include considering (1) acquisition of tethered kneeboard or surf ski-mounted single-beam sonars for rapid deployment by local agencies, (2) acquisition of remote-controlled vessels mounted with single-beam and side-scan sonars for statewide deployment, (3) development of large-scale particle image velocimetry systems using remote-controlled drones for stream velocity and direction measurement during floods, (4) physical modeling to develop Illinois-specific hydrodynamic loading coefficients for Illinois bridges during flood conditions, and (5) development of holistic risk-based bridge assessment tools that incorporate structural, geotechnical, hydraulic, and scour measurements to provide rapid feedback for bridge closure decisions.IDOT-R27-SP50Ope

    Full stack development toward a trapped ion logical qubit

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    Quantum error correction is a key step toward the construction of a large-scale quantum computer, by preventing small infidelities in quantum gates from accumulating over the course of an algorithm. Detecting and correcting errors is achieved by using multiple physical qubits to form a smaller number of robust logical qubits. The physical implementation of a logical qubit requires multiple qubits, on which high fidelity gates can be performed. The project aims to realize a logical qubit based on ions confined on a microfabricated surface trap. Each physical qubit will be a microwave dressed state qubit based on 171Yb+ ions. Gates are intended to be realized through RF and microwave radiation in combination with magnetic field gradients. The project vertically integrates software down to hardware compilation layers in order to deliver, in the near future, a fully functional small device demonstrator. This thesis presents novel results on multiple layers of a full stack quantum computer model. On the hardware level a robust quantum gate is studied and ion displacement over the X-junction geometry is demonstrated. The experimental organization is optimized through automation and compressed waveform data transmission. A new quantum assembly language purely dedicated to trapped ion quantum computers is introduced. The demonstrator is aimed at testing implementation of quantum error correction codes while preparing for larger scale iterations.Open Acces

    Chinese Benteng Women’s Participation in Local Development Affairs in Indonesia: Appropriate means for struggle and a pathway to claim citizen’ right?

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    It had been more than two decades passing by aftermath the devastating Asia’s Financial Crisis in 1997, subsequently followed by Suharto’s step down from his presidential throne which he occupied for more than three decades. The financial turmoil turned to a political disaster furthermore has led to massive looting that severely impacted Indonesians of Chinese descendant, including unresolved mystery of the most atrocious sexual violation against women and covert killings of students and democracy activists in this country. Since then, precisely aftermath May 1998, which publicly known as “Reformasi”1, Indonesia underwent political reform that eventually corresponded positively to its macroeconomic growth. Twenty years later, in 2018, Indonesia captured worldwide attention because it has successfully hosted two internationally renowned events, namely the Asian Games 2018 – the most prestigious sport events in Asia – conducted in Jakarta and Palembang; and the IMF/World Bank Annual Meeting 2018 in Bali. Particularly in the IMF/World Bank Annual Meeting, this event has significantly elevated Indonesia’s credibility and international prestige in the global economic powerplay as one of the nations with promising growth and openness. However, the narrative about poverty and inequality, including increasing racial tension, religious conservatism, and sexual violation against women are superseded by friendly climate for foreign investment and eventually excessive glorification of the nation’s economic growth. By portraying the image of promising new economic power, as rhetorically promised by President Joko Widodo during his presidential terms, Indonesia has swept the growing inequality in this highly stratified society that historically compounded with religious and racial tension under the carpet of digital economy.Arte y Humanidade

    The role of time in video understanding

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    Characterisation of the unfolded protein response in prostate cancer, and investigation of the ATF6 interactome using a modified mammalian expression system.

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    Prostate cancer (PCa) cells grow in an environment which is known to cause endoplasmic reticulum (ER) stress. This activates a process called the unfolded protein response (UPR) which PCa utilises in order to survive and adapt to the adverse environmental conditions. Using interdisciplinary approaches and tissue culture models representing different stages of PCa, this project investigated the link between the UPR and the key oncogenic driver of PCa, the androgen receptor. It has been observed that hormone responsive PCa utilises all three UPR arms in order to promote ER homeostasis and cell survival. The importance of the UPR during the progression of PCa to the castrate resistant stage was also assessed. Interestingly, UPR signalling was inactivated in castrate-resistant models of PCa, and the cells were instead dependent on the ER-associated degradation (ERAD) pathway in order to resolve the stress and survive. These findings have identified potential UPR vulnerabilities that can be targeted to prevent disease progression. Little is known about the structure and interaction partners of the UPR sensor ATF6, as protein expression has been shown to be problematic. To resolve this issue a stable tetracycline-inducible HEK293S GnTI(-) cell line for the expression of ATF6 was generated and mass spectrometry performed to characterise the ATF6 interactome. Sixty novel interaction partners of ATF6 were identified, most of which are associated with the cytoskeleton, such as Spectrin β-II and p195, which were validated by immunoblotting. It is hoped that the use of this modified expression system will provide an advantage in the process of expression, solubilisation and structure determination of ATF6 and of other membrane proteins

    Wildlife wars in an age of changing climate and social change: Assessing the social and ecological dimensions of Human Wildlife Conflict and Conservation Initiatives in the Rangelands of Kenya

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    Human wildlife conflict is an on-going global problem that is threatening the existence of iconic species of wildlife like Elephants and the big cats. It is also a human rights issue as it threatens the livelihoods of the many people who in most cases have been structurally marginalized and vulnerable. It is not wise to think that human wildlife conflict will disappear by itself. A lot of work has gone into trying to understand the problem and how to solve it. However, most of the efforts target local area challenges with short-term solutions that are not based on an understanding of landscape level processes and global issues like climate change. Driven by our long-term experience of working community based natural resources management and knowledge of the global issues, we sought to understand the human dimension of human-wildlife dynamics and particularly the conflict affecting pastoralists that is occasioned by predation of their livestock by lions and other big cats. We used mixed methods to examine theoretical assumptions that have been put forward on human wildlife conflict and link human wildlife conflict (predation events) to climate change dynamics. Using focus group discussions, we collected both qualitative and quantitative data, which we analysed qualitatively and statistically. The quantitative findings were validated and explained better by use of qualitative data collected from three communities living in the larger southern Kenya rangelands landscape. The aim of this thesis was to (1) Establish the link between human wildlife conflicts and climate (rainfall) over seasons within a year and annual time scales. (2) Establish what motivates the pastoralists to kill lions (3) Assess how perceptions of people living with the big cats change over time and (4) Review the role of communities and multi-level governance biodiversity conservation. The findings from this research show that community members value the ecosystem services and goods they receive from nature. While the challenges associated with climate change (drought) are likely to increase the prevalence of human wildlife conflict, the pastoralists are more tolerant to the wildlife when there is proper compensation or consolation. The results also show that the Maasai only kill lions when they are certain the lion is the culprit animal that caused the loss of their livestock, not indiscriminately. Our comparison of the results over a period of ten years show that the community members' attitudes, behaviour, and perceptions of wildlife changed over time and across regions as a result of a change in the climate factors and the attitude of the conservation authorities. Compensation programs and other forms of incentives to the pastoralists or local people for living with wildlife would go a long way in ensuring tolerance and co-existence with wildlife. With co-existence, any negative interactions between people and wildlife is overshadowed by the benefits and therefore less and less of human wildlife conflict. Our results also show that governance of natural resources and local institutions, rules and norms on wildlife and natural resources conservation are important pillars in mitigating human wildlife conflict. This research also shows that while people are affected as individuals, actions to minimize the challenges are better decided on and actioned at a community level. Community conservancies with a functional governance system may be the basis for sustainable rangelands, wildlife, and livelihoods. Actions at a wider landscape are likely to have better results than local level, short-term, and poorly resourced interventions
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