30 research outputs found
A brain-inspired cognitive system that mimics the dynamics of human thought
In recent years, some impressive AI systems have been built that can play games and answer questions about large quantities of data. However, we are still a very long way from AI systems that can think and learn in a human-like way. We have a great deal of information about how the brain works and can simulate networks of hundreds of millions of neurons. So it seems likely that we could use our neuroscientific knowledge to build brain-inspired artificial intelligence that acts like humans on similar timescales. This paper describes an AI system that we have built using a brain-inspired network of artificial spiking neurons. On a word recognition and colour naming task our system behaves like human subjects on a similar timescale. In the longer term, this type of AI technology could lead to more flexible general purpose artificial intelligence and to more natural human-computer interaction
Deadlines in space: Selective effects of coordinate spatial processing in multitasking
Radioprotection of cultured cells by preincubation in medium containing deuterium oxide
Pretreatment with deuterium oxide (D2O) has been shown to protect mice against lethal effects of X-rays. In contrast, X-irradiation of cultured mammalian cells in D2O-containing medium has previously been reported to result in increased cell killing. Therefore, the effects of preincubation in medium containing 20% D2O on radiosensitivity were tested, using cells of a heat-sensitive cell-cycle mutant (21-Tb) of the murine mastocytoma P 815-X2. The mutant cells proliferate at 33 degrees C and are arrested in G1 phase in a state of reversible proliferative quiescence at 39.5 degrees C. Prior to irradiation with single X-ray doses of 0-10 Gy, the cells were cultured in normal or D2O-containing medium, either for 96 h at 33 degrees C ('proliferating cells'), or for 72 h at 33 degrees C followed by 24 h at 39.5 degrees C ('arrested cells'). After X-irradiation the cells were resuspended in normal medium, and cell survival was determined by the capacity of cells to form colonies in fibrin gels. Preincubation in medium containing 20% D2O resulted in a radioprotective effect on both proliferating and arrested cells, particularly at the higher X-ray doses. This radioprotection was manifested as a decreased slope of the semilogarithmic survival curves, whereas pretreatment with D2O had no significant effect on postirradiation repair as judged from Dq values. These results support the interpretation that the increase in postirradiation survival may be attributed to incorporation of deuterium into cellular metabolites during the period of preincubation
Monoclonal antibody SM047 as an immunohistochemical marker of ovarian adenocarcinoma.
GesondheidswetenskappeMolekul�re Biologie & MensgenetikaPlease help us populate SUNScholar with the post print version of this article. It can be e-mailed to: [email protected]
Association of the subtype 2 of the Epstein-Barr virus with T-cell non- Hodgkin's lymphoma of the midline granuloma type [see comments]
Vascular Transformation of Bilateral Cervical Lymph Node Sinuses: A Rare Entity Masquerading as Tumor Recurrence
Angiomyomatous hamartoma: a rare case report with review of the literature
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mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} --> <!--[endif]--><span style="font-size: 12pt; font-family: ">Angiomyomatous hamartoma of the lymph node is a benign vascular disorder of unknown aetiology, first described in 1991. However, to the best of our knowledge, it still remains a rare entity with only 17 cases reported so far. We report a case in an 82 year old male, present a review of literature, and stress the importance of diagnosis of this benign condition which obviates the need for unnecessary and extensive surgical resection.<br /></span