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    Three Papers in the Eye of the ‘AI Breast Cancer Detection’ Storm Computer Science

    January 18, 2020

    Three Papers in the Eye of the ‘AI Breast Cancer Detection’ Storm Computer Science

    Three Papers in the Eye of the ‘AI Breast Cancer Detection’ Storm

    Posted: 17 Jan 2020 02:44 PM PST

    Remember what happened about using AI to detect breast cancer a few weeks ago? A trio of AI detecting breast cancer papers from Google, NYU, and DeepHealth have triggered huge discussions. What are the breakthroughs? How to compare these studies? Is AI truly beating radiologists? And where exactly are we right now?

    Here is the recap: https://medium.com/syncedreview/three-papers-in-the-eye-of-the-ai-breast-cancer-detection-storm-a63d2a2480ea

    Related papers:

    The NYU paper Deep Neural Networks Improve Radiologists' Performance in Breast Cancer Screening is available here, the DeepHealth paper Robust Breast Cancer Detection in Mammography and Digital Breast Tomosynthesis Using Annotation-Efficient Deep Learning Approach is here, and the Google paper International Evaluation of an AI System for Breast Cancer Screening is here.

    submitted by /u/Yuqing7
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    How is this rolling hash function derived?

    Posted: 18 Jan 2020 03:42 AM PST

    I'm trying to under the algorithm to calculate the next ngram hash: http://courses.csail.mit.edu/6.006/fall09/lecture_notes/lecture06.pdf (Do a CTRL-F "magic again" and you'll see the formula).

    Could anyone give a step-by-step derivation of how the final (third) equation is derived from the 2nd?

    It appears to use the fact that

    (a + b) mod m = ((a mod m) + (b mod m)) mod m (a * b) mod m = ((a mod m) * (b mod m)) mod m

    What I have tried so far:

    h2 = ( (h1 b4 mod by m) * b) + ( s[i + l] - s[i] * b^l) ) ) mod b = ( ( (h1 b4 mod by m)*b ) mod m ) + (s[i + l] - s[i] * b^l ) mod m ) )mod m = ( ( (h1)(b mod m) )mod m + (s[i + l] - s[i] * b^l) mod m ) mod m = ( h1*(bmodm) + S[i + l} - s[i]*b^l) mod m

    But I need to get to:

    h2 = (h1 * b + s[i + l] - s[i] * (b^l mod m)) mod m
    submitted by /u/dexterleng
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    Discord server for programmers ranging from beginner to professional

    Posted: 17 Jan 2020 11:11 PM PST

    Small discord server community for computer programmers/developers. Friendly, sensible community for you to build and polish on your skills.

    Code Lab: https://discord.gg/B2dPWyQ

    submitted by /u/loyal_doge
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    Code Review best practices

    Posted: 17 Jan 2020 04:06 PM PST

    Passing binary search starting first and last indices 0 and n (instead of 0 and n-1) only affects searches for elements bigger than the biggest element in the list. Why?

    Posted: 17 Jan 2020 01:16 PM PST

    Binary search is usually passed 0 and n-1 as the start and end indices (where n is the size of the list you're searching through), but if you pass it 0 and n instead then it works perfectly except for one thing: you get an out of bounds error if you try and search for anything larger than the largest value in the list.

    This exact pattern holds for trinary search as well, but I'm not sure if it'll hold for any n-ary search (if it does, it'd be interesting to see a proof of such a thing!)

    Can anyone give some intuition as to why this is?

    submitted by /u/JealousAnimal
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    Is stepwise regression NP-complete?

    Posted: 17 Jan 2020 08:43 AM PST

    I learned a bit about stepwise regression in my stats class yesterday, and I thought immediately that that kind of sounds like an NP-complete problem. Was wondering what those who are more knowledgeable than I am in complexity if it is.

    The basic way it works (in R at least) is to calculate the AIC for each of a set of potential explanatory variables, and then to sequentially add them to the total until the addition of more variables makes the overall AIC worse, the goal being to find the best possible AIC value resulting from some combination of explanatory variables.

    submitted by /u/grilled_cheesez
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    Boeing Software Shit Show

    Posted: 17 Jan 2020 07:02 PM PST

    Can anyone elucidate how much code we're talking about for the 737 MAX?

    I will assert that I can repair it using, primarily, DELETE. How long it will take me will depend on how much BS is in there.

    submitted by /u/MedianPlusPlus
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