A Quantum Algorithm To Locate Unknown Hashes For Known N-Grams Within A Large Malware Corpus

Quantum computing has evolved quickly in recent years and is showing significant benefits in a variety of fields. Malware analysis is one of those fields that could also take advantage of quantum computing. The combination of software used to locate the most frequent hashes and $n$-grams between benign and malicious software (KiloGram) and a quantum search algorithm could be beneficial, by loading the table of hashes and $n$-grams into a quantum computer, and thereby speeding up the process of mapping $n$-grams to their hashes. The first phase will be to use KiloGram to find the top-$k$ hashes and $n$-grams for a large malware corpus. From here, the resulting hash table is then loaded into a quantum machine. A quantum search algorithm is then used search among every permutation of the entangled key and value pairs to find the desired hash value. This prevents one from having to re-compute hashes for a set of $n$-grams, which can take on average $O(MN)$ time, whereas the quantum algorithm could take $O(\sqrt{N})$ in the number of table lookups to find the desired hash values.Comment: IEEE Quantum Week 2020 Conferenc

The deformation of inhomogeneous materials and consequent geological implications

Imperial Users onl

Advances in Repurposing and Recycling of Post-Vehicle-Application Lithium-Ion Batteries

Increased electrification of vehicles has increased the use of lithium-ion batteries for energy storage, and raised the issue of what to do with post-vehicle-application batteries. Three possibilities have been identified: 1) remanufacturing for intended reuse in vehicles; 2) repurposing for non-vehicle, stationary storage applications; and 3) recycling, extracting the precious metals, chemicals and other byproducts. Advances in repurposing and recycling are presented, along with a mathematical model that forecasts the manufacturing capacity needed for remanufacturing, repurposing, and recycling. Results obtained by simulating the model show that up to a 25% reduction in the need for new batteries can be achieved through remanufacturing, that the sum of repurposing and remanufacturing capacity is approximately constant across various scenarios encouraging the sharing of resources, and that the need for recycling capacity will be significant by 2030. A repurposing demonstration shows the use of post-vehicle-application batteries to support a semi-portable recycling platform. Energy is collected from solar panels, and dispensed to electrical devices as required. Recycling may be complicated: lithium-ion batteries produced by different manufacturers contain different active materials, particularly for the cathodes. In all cases, however, the collecting foils used in the anodes are copper, and in the cathodes are aluminum. A common recycling process using relatively low acid concentrations, low temperatures, and short time periods was developed and demonstrated

Investigating the 'latent' deficit hypothesis : age at time of head injury, executive and implicit functions and behavioral insight

This study investigated the 'latent deficit' hypothesis in two groups of frontotemporal headinjured patients, those injured prior to steep morphological and corresponding functional maturational periods for frontotemporal networks (≤ age 25), and those injured >28 years. The latent deficit hypothesis proposes that early injuries produce enduring cognitive deficits manifest later in the lifespan with graver consequences for behavior than adult injuries, particularly after frontal pathology (Eslinger, Grattan, Damasio & Damasio, 1992). Implicit and executive deficits both contribute to behavioral insight after frontotemporal head injury (Barker, Andrade, Romanowski, Morton & Wasti, 2006). On the basis of morphological and behavioral data, we hypothesised that early injury would confer greater vulnerability to impairment on tasks associated with frontotemporal regions than later injury. Patients completed experimental tasks of implicit cognition, executive function measures and the DEX measure of behavioural insight (Behavioral Assessment of the Dysexecutive Syndrome: Wilson, Alderman, Burgess, Emslie, & Evans, 1996). The Early Injury group were more impaired on implicit cognition tasks compared to controls that Late Injury patients. There were no marked group differences on most executive function measures. Executive ability only contributed to behavioral awareness in the Early Injury Group. Findings showed that age at injury moderates the relationship between executive and implicit cognition and behavioral insight and that early injuries result in longstanding deficits to functions associated with frontotemporal regions partially supporting the latent deficit hypothesis

China's Rise: Challenges and Opportunities

The global economic crisis has made clear China's importance and expanding role on the world stage. China's Rise: Challenges and Opportunities, explains actions both China and the United States can take that will not only maximize the opportunities for China's constructive integration into the international community but also help form a domestic consensus that will provide a stable foundation for such policies. This book is unique in that it analyzes the authoritative data on China's economy, foreign and domestic policy, and national security. China is confronting domestic challenges that are in many ways side effects of its economic successes, while simultaneously trying to take advantage of the foreign policy benefits of those same successes. * The book from The China Balance Sheet Project, a joint, multiyear project of the Center for Strategic and International Studies and the Peterson Institute, discusses China's military modernization, China's increasing soft power influence in Asia and around the world, China's policy toward Taiwan, domestic political development, Beijing's political relations with China's provincial and municipal authorities, corruption and social unrest, rebalancing China's economic growth, the exchange rate controversy, energy and the environment, industrial policy, trade disputes, and investment issues. The paperback book features a new introduction that addresses events since fall of 2008 and provides context for the book in light of those events.

China's Rise: Challenges and Opportunities

China has emerged as an economic powerhouse (projected to have the largest economy in the world in a little over a decade) and is taking an ever-increasing role on the world stage. China's Rise: Challenges and Opportunities will help the United States and the rest of the world better comprehend the facts and dynamics underpinning China's rise--an understanding that becomes more and more important with each passing day. Additionally, the authors suggest actions both China and the United States can take that will not only maximize the opportunities for China's constructive integration into the international community but also help form a domestic consensus that will provide a stable foundation for such policies. Filled with facts for policymakers, this much anticipated book's narrative-driven, accessible style will appeal to the general reader. This book is unique in that it analyzes the authoritative data on China's economy, foreign and domestic policy, and national security. * The expert judgments in this book paint a picture of a China confronting domestic challenges that are in many ways side effects of its economic successes, while simultaneously trying to take advantage of the foreign policy benefits of those same successes. China's Rise: Challenges and Opportunities from The China Balance Sheet Project, a joint, multiyear project of the Center for Strategic and International Studies and the Peterson Institute, discusses China's military modernization, China's increasing soft power influence in Asia and around the world, China's policy toward Taiwan, domestic political development, Beijing's political relations with China's provincial and municipal authorities, corruption and social unrest, rebalancing China's economic growth, the exchange rate controversy, energy and the environment, industrial policy, trade disputes, and investment issues.