Faithful replication of the mitochondrial genome is carried out by a set of key nuclear-encoded proteins. DNA polymerase γ is a core component of the mtDNA replisome and the only replicative DNA polymerase localized to mitochondria. The asynchronous mechanism of mtDNA replication predicts that the replication machinery encounters dsDNA and unique physical barriers such as structured genes, G-quadruplexes, and other obstacles. In vitro experiments here provide evidence that the polymerase γ heterotrimer is well-adapted to efficiently synthesize DNA, despite the presence of many naturally occurring roadblocks. However, we identified a specific G-quadruplex–forming sequence at the heavy-strand promoter (HSP1) that has the potential to cause significant stalling of mtDNA replication. Furthermore, this structured region of DNA corresponds to the break site for a large (3,895 bp) deletion observed in mitochondrial disease patients. The presence of this deletion in humans correlates with UV exposure, and we have found that efficiency of polymerase γ DNA synthesis is reduced after this quadruplex is exposed to UV in vitro.

VOLUME 289 (2014) PAGES 6604–6618In Fig. 4G, in the foxi1 panel, the images in Fig. 4G, i and l, corresponding to “smad1 MO” and “smad5 MO + samd1/9 mRNA” samples, respectively, were inadvertently reused during figure preparation. This error has now been corrected using images pertaining to each treatment and sample. This correction does not affect the results or conclusions of the work.jbc;295/52/18650/F4F1F4Figure 4G.

Higher Education in South Africa: Demands for Inclusion and the Challenges of Reform 17 October 2018 — 5:00PM TO 6:00PM Anonymous (not verified) 18 September 2018 Chatham House, London

Undercurrents: Europe's far-right educational institutions Audio bhorton.drupal 8 October 2021

In Hungary, France and Spain, new political movements from the far-right are attempting to reshape their education systems.

Under the supportive eye of Prime Minister Viktor Orbán, the recently established National University of Public Service seeks to embed nationalist illiberal values in a new generation of Hungarian students. Meanwhile in France and Spain, far-right public figure Marion Maréchal has turned away from the electoral politics of the Front Nationale to set up a new conservative research institute, ISSEP.

Both of these developments represent a challenge to the liberal values which underpin the existing international order. To find out more, Ben spoke with Professor Dorit Geva and Dr Felipe Santos, whose recent article in International Affairs considers the implications of this illiberal educational turn. 

Quantification of ¹⁸F-FDG PET images is useful for accurate diagnosis and evaluation of various brain diseases, including brain tumors, epilepsy, dementia, and Parkinson disease. However, accurate quantification of ¹⁸F-FDG PET images requires matched 3-dimensional T₁ MRI scans of the same individuals to provide detailed information on brain anatomy. In this paper, we propose a transfer learning approach to adapt a pretrained deep neural network model from amyloid PET to spatially normalize ¹⁸F-FDG PET images without the need for 3-dimensional MRI. Methods: The proposed method is based on a deep learning model for automatic spatial normalization of ¹⁸F-FDG brain PET images, which was developed by fine-tuning a pretrained model for amyloid PET using only 103 ¹⁸F-FDG PET and MR images. After training, the algorithm was tested on 65 internal and 78 external test sets. All T₁ MR images with a 1-mm isotropic voxel size were processed with FreeSurfer software to provide cortical segmentation maps used to extract a ground-truth regional SUV ratio using cerebellar gray matter as a reference region. These values were compared with those from spatial normalization-based quantification methods using the proposed method and statistical parametric mapping software. Results: The proposed method showed superior spatial normalization compared with statistical parametric mapping, as evidenced by increased normalized mutual information and better size and shape matching in PET images. Quantitative evaluation revealed a consistently higher SUV ratio correlation and intraclass correlation coefficients for the proposed method across various brain regions in both internal and external datasets. The remarkably good correlation and intraclass correlation coefficient values of the proposed method for the external dataset are noteworthy, considering the dataset’s different ethnic distribution and the use of different PET scanners and image reconstruction algorithms. Conclusion: This study successfully applied transfer learning to a deep neural network for ¹⁸F-FDG PET spatial normalization, demonstrating its resource efficiency and improved performance. This highlights the efficacy of transfer learning, which requires a smaller number of datasets than does the original network training, thus increasing the potential for broader use of deep learning–based brain PET spatial normalization techniques for various clinical and research radiotracers.

An American woman who was traveling in Hungary was killed in Budapest last week allegedly by a man she met on vacation.

Ukraine's military intelligence has intercepted what it claims are radio communications between North Korean soldiers in Russia, amid media reports of a massive troop buildup ahead of an attack in the Kursk region.

Noritaka Hoshi, Senior Manager, AI Platform Division, talks about the impetus for and challenges within the development of SX-Aurora TSUBASA or a massive SIMD, created to handle enormous computing and […]

The post Advance Science, Technology and Sophistication with SX-Aurora TSUBASA or Vector Processor or Vector Engine (VE) appeared first on HPCwire.

What can be achieved using applications such as AI/ML, Deep Learning, and Big Data Analytics has been revolutionized by Magnum IO GPUDirect Storage’s capabilities. Agencies have invested in these solutions […]

The post Accelerating GPU Based Applications with NVIDIA Validated Magnum IO GPUDirect Storage and Pavilion appeared first on HPCwire.

LONDON, Nov. 1, 2024 — Quantum Motion, a UK-based quantum computing scale-up founded by Professor John Morton, University College London (UCL), and Professor Simon Benjamin, University of Oxford, has worked […]

The post Quantum Motion and Goldman Sachs Identify Quantum Applications in Financial Services Project appeared first on HPCwire.

Nov. 8, 2024 — Across the United States, research shows that computer science (CS) courses teach a range of transferable skills that help students as they enter the workforce. But in […]

The post UT Austin-UTEP Partnership Supports Growth of Texas CS Education appeared first on HPCwire.

Microsoft and Quantinuum reported the ability to create 12 logical qubits on Quantinuum’s H2 trapped ion system this week and also reported using two logical qubits on an H1 system […]

The post Microsoft, Quantinuum Use Hybrid Workflow to Simulate Catalyst appeared first on HPCwire.

Sept. 23, 2024 — Altera, an Intel Company, today unveiled an array of FPGA hardware, software and development tools that make its programmable solutions more accessible across a broader range of […]

The post Intel’s Altera Unveils New FPGA Tools and Kits to Boost AI and Edge Applications appeared first on HPCwire.

A low-carbohydrate diet may help adults with type 2 diabetes gain better blood sugar control and make it possible to decrease diabetes medication, a new study suggests.

New blood tests screen for colorectal cancer in a much less invasive way than colonoscopy, but deaths will increase if many people choose this alternative, a new study indicates.

Being a "weekend warrior" -- engaging in exercise once or twice per week -- may be as beneficial as regular sessions in decreasing the risk of cognitive decline that often leads to dementia, a new study concludes.

Experiencing excessive daytime sleepiness as an older adult can spell dire consequences that ultimately may lead to full-blown dementia, according to a new study funded by the National Institute on Aging.

Google is educating users about the lunar cycle with its latest interactive Doodle released Thursday.

There's a simple way to increase your cat's happiness, says animal behaviorist Nicky Trevorrow. She explains the importance of play for our feline friends — and for basically any species (looking at you, dog lovers!) — and shares specific, actionable strategies to boost your cat's mental and physical health.

In a universe not unlike ours, a tech-environmentalist group claims to have created an AI that is the direct “voice of the earth,” a computer connected via electrodes to the mycelium network under an ancient forest named S.A.N (Sentient Advocate of Nature). The film imagines what nature thinks of human impact on the planet, as a renowned reporter conducts a world-first interview with S.A.N.

This Quality Counts 2019 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

The new U.S. Department of Education guidance creates a federal process for individuals and organizations to file complaints under the federal Religious Freedom Restoration Act.

This Quality Counts 2020 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

Female teachers, principals, and superintendents in Pennsylvania earn significantly less money than their male counterparts, a new study shows.

This Quality Counts 2019 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

This Quality Counts 2020 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

The two states are the first in 20 years to add such a requirement.

From guest blogger Kimberly Shannon Rhode Island Education Commissioner Deborah Gist has been diagnosed with a brain tumor and will undergo surgery in September, according to the Associated Press. She is expected to have a full recovery, but will be working a limited schedule until her operation. Af

This Quality Counts 2019 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

This Quality Counts 2020 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

Principals and superintendents are caught between politicians’ demands, an anxious public, and experts’ contrary advice about the path forward during the pandemic. The unspoken message: You’re on your own.

Matthew Utterback, the superintendent of the North Clackamas district in Oregon, was named last week as the 2017 National Superintendent of the Year.

This Quality Counts 2019 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

This Quality Counts 2020 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

This Quality Counts 2019 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

Lawmakers in Michigan, Mississippi, North Dakota, and Utah have all gave previews this to their 2018 fiscal year budget proposals.

This Quality Counts 2020 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

Any discussion in politics of the future of education in Ohio inevitably turns to the Electronic Classroom of Tomorrow.

This Quality Counts 2019 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

This Quality Counts 2020 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

All districts in Wyoming will be required to provide K-12 computer science instruction, and Idaho high schools will offer at least one high school CS course.

This Quality Counts 2019 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.

This Quality Counts 2020 Highlights Report captures all the data you need to assess your state's performance on key educational outcomes.