منابع مشابه
Walking Cautiously Into the Collatz Wilderness: Algorithmically, Number Theoretically, Randomly
From many points of view, the challenge posed by the Collatz problem – written down in his notebook by Lothar Collatz in 1937 and known today also as the 3n+1 mapping, 3n+1 problem, Hasse’s algorithm, Kakutani’s problem, Syracuse algorithm, Syracuse problem, Thwaites conjecture, and Ulam’s problem — is unique in the history of modern mathematics. The fact is — even if the claim of the Collatz c...
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The rural central Kentucky landscape today appears as open, rolling bluegrass fields, punctuated by relicts of “woodland pasture” and partitioned by stone or board fences, the latter usually painted black. Historic residences often sit back from the road at the end of a long drive, presenting a picture of placidity, prosperity and gracious living. Country roads are organic in quality, often app...
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Analysis of tissue sections from transurethrally resected bladder tumours using anti-CD3 antibody showed the presence of T lymphocytes in intra-epithelial layers in eight of 12 cases investigated. In a larger group of patients, Tumour Infiltrating Lymphocyte (TIL) growth was established from six of 19 cases using Interleukin-2 (IL-2) and conditioned medium (CM) and resulted in the expansion of ...
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How a chance discovery in the Tasmanian rainforest changed the course of my scientific career.
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Increasingly, wilderness managers must choose between the objective of wildness (“untrammeled” wilderness) and the objectives of naturalness and solitude. This dilemma has surfaced with awareness of the pervasiveness of human influence in wilderness and that regulation is often the only way to maintain outstanding opportunities for solitude. Should we trammel wilderness to compensate for unnatu...
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ژورنال
عنوان ژورنال: Science
سال: 2015
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.347.6227.1282