Posts Tagged ‘stl’

Bluetooth was named after a Danish King (but just bad tooth?)

August 2, 2019

“The first documented appearance of Harald’s nickname “Bluetooth” (as blatan; Old Norse *blátǫnn) is in the Chronicon Roskildense (written ca. 1140), alongside the alternative nickname Clac Harald.[5] Clac Harald appears to be a confusion of Harald Bluetooth with the legendary or semi-legendary Harald Klak, son of Halfdan. The byname is given as Blachtent and explicitly glossed as “bluish or black tooth” (dens lividus vel niger) in a chronicle of the late 12th century, Wilhelmi abbatis regum Danorum genealogia.[6] The traditional explanation is that Harald must have had a conspicuous bad tooth that appeared “blue” (i.e. “black”, as blár “blue” meant “blue-black”, or “dark-coloured”). Another explanation, proposed by Scocozza (1997) is that he was called “blue thane” (or “dark thane”) in England (with Anglo-Saxon thegn corrupted to tan when the name came back into Old Norse).[7]”

NEJM: Record-Breaking Performance in a 70-Year-Old Marathoner

April 13, 2019

We determined the physiological profile of a 70-year-old male marathoner who ran the event in 2:54:23…

LDL 84mg/dL and HDL 66mg/dL, quite impressive…

Small research teams ‘disrupt’ science more radically than large ones

February 28, 2019

“The authors describe and validate a citation-based index of ‘disruptiveness’ that has previously been proposed for patents6. The intuition behind the index is straightforward: when the papers that cite a given article also reference a substantial proportion of that article’s references, then the article can be seen as consolidating its scientific domain. When the converse is true — that is, when future citations to the article do not also acknowledge the article’s own intellectual forebears — the article can be seen as disrupting its domain.

The disruptiveness index reflects a characteristic of the article’s underlying content that is clearly distinguishable from impact as conventionally captured by overall citation counts. For instance, the index finds that papers that directly contribute to Nobel prizes tend to exhibit high levels of disruptiveness, whereas, at the other extreme, review articles tend to consolidate their fields.”

Journal comparison: time and(or?) impact

August 16, 2018

dynamic LDA

March 5, 2018

Dynamic Topic Models Classic work by @Blei_lab & J Lafferty adapts the #LDA formalism describing documents in terms of latent topics – to allow these to evolve over time

George Church Medical Info

January 5, 2018
George Church discloses a lot of his medical records

Timing, rates and spectra of human germline mutation : Nature Genetics : Nature Publishing Group

May 17, 2016

Timing, rates & spectra of human germline mutation Metaanalysis of >6500 events gives a de novo mutational signature

PLOS Genetics: A Simple Model-Based Approach to Inferring and Visualizing Cancer Mutation Signatures

February 27, 2016

Model-Based Approach to Inferring…#Cancer Mutation Signatures Assuming independence betw 3 NTs, 11 v 95 parameters

The first contribution of this paper is to suggest a more parsimonious approach to modelling mutation signatures, with the benefit of producing both more stable estimates and more easily interpretable signatures. In brief, we substantially reduce the number of parameters per signature by breaking each mutation pattern into “features”, and assuming independence across mutation features. For example, consider the case where a mutation pattern is defined by the substitution and its two flanking bases. We break this into three features
(substitution, 3′ base, 5′ base), and characterize each mutation signature by a probability distribution for each feature (which, by our independence assumption, are multiplied together to define a distribution on mutation patterns). Since the number of possible values for each feature is 6, 4, and 4 respectively this requires 5 + 3 + 3 = 11 parameters instead of 96 − 1 = 95 parameters. Furthermore, extending this model to account for ±n neighboring bases requires only 5 + 6nparameters instead of 6 × 42n − 1. For example, considering ±2 positions requires 17 parameters instead of 1,535. Finally,
incorporating transcription strand as an additional feature adds just one parameter, instead of doubling the number of parameters. “}}

Identification of neutral tumor evolution across cancer types : Nature Genetics : Nature Publishing Group

February 27, 2016

Neutral tumor #evolution across #cancer types Initial burst of driver events followed by random mutations

H1B visa statistics

July 23, 2015