Charles D. Hill

Learn More
OBJECTIVE The first US Food and Drug Administration-approved clinical trial to treat amyotrophic lateral sclerosis (ALS) with neural stem cell-based therapy is in progress. The goal of the current study was to identify and assess the survival of human spinal cord-derived neural stem cells (HSSCs) transplanted into the spinal cord in patients with ALS. (More)
Recent work on fault-tolerant quantum computation making use of topological error correction shows great potential, with the 2d surface code possessing a threshold error rate approaching 1% [1, 2]. However, the 2d surface code requires the use of a complex state distillation procedure to achieve universal quantum computation. The colour code of [3] is a(More)
The exceptionally long quantum coherence times of phosphorus donor nuclear spin qubits in silicon, coupled with the proven scalability of silicon-based nano-electronics, make them attractive candidates for large-scale quantum computing. However, the high threshold of topological quantum error correction can only be captured in a two-dimensional array of(More)
Long-term cognitive changes were observed in 8 depressed patients whose pretreatment cognitive impairment (depressive dementia or pseudodementia) resolved after treatment with ECT. Improved performance on the Mattis Dementia Rating Scale was maintained throughout a 4-year follow-up period. Improvements on Memory and Initiation and Perseveration subscales(More)
This two-semester course examines the theory and practice of grand strategy in historical and contemporary contexts from a variety of analytical perspectives. It defines grand strategy as 'the calculated relation of means to large ends'. It focuses on how parts relate to the whole in whatever an individual, a corporation or a nation might be seeking to(More)
In this paper we demonstrate how data encoded in a five-qubit quantum error correction code can be converted, fault-tolerantly, into a seven-qubit Steane code. This is achieved by progressing through a series of codes, each of which fault-tolerantly corrects at least one error. Throughout the conversion the encoded qubit remains protected. We found, through(More)
While it is known that shared quantum entanglement can offer improved solutions to a number of purely cooperative tasks for groups of remote agents, controversy remains regarding the legitimacy of quantum games in a competitive setting—in particular, whether they offer any advantage beyond what is achievable using classical resources. We construct a(More)
The authors examined differences between the verbal memory performance of older patients with major depression (MD) alone; major depression with reversible depression-related cognitive dysfunction (MD/DRCD); and primary dementia and major depression (DEM/MD). Patients were evaluated before antidepressant treatment and 6 and 15 months after treatment. Of the(More)
Delirium is commonly defined as a transient organic brain syndrome characterized by concurrent disorders of attention, perception, thinking, memory, psychomotor behavior, and the sleep-wake cycle. One of the difficulties in studying delirium is that symptoms tend to fluctuate over the course of the day. Pre-existing organic brain disease appears to be a(More)