# AI for Good **URL:** https://community.deeplearning.ai/c/course-q-a/ai-for-good/226.md?page=1 [Latest](https://community.deeplearning.ai/latest.md) · [Categories](https://community.deeplearning.ai/categories.md) · [Tags](https://community.deeplearning.ai/tags.md) **Page:** 2 --- ## [Not clear how LDA is useful or the best tool](https://community.deeplearning.ai/t/not-clear-how-lda-is-useful-or-the-best-tool/409989)
**Author:** [@toontalk](https://community.deeplearning.ai/u/toontalk)\ **Replies:** 2\ **Last updated:** [August 8, 2023, 7:26am UTC](https://community.deeplearning.ai/t/not-clear-how-lda-is-useful-or-the-best-tool/409989 "2023-08-08T07:26:14Z")
When I look at the words in different generated topics I find it hard to see what the theme of each really is. And I worry that LDA is too crude since it ignores word order, handles negation and synonyms poorly, and gen… --- ## [Week 3 Lab 1 Errata](https://community.deeplearning.ai/t/week-3-lab-1-errata/408027)
**Author:** [@ybakos](https://community.deeplearning.ai/u/ybakos)\ **Replies:** 1\ **Last updated:** [August 4, 2023, 6:13pm UTC](https://community.deeplearning.ai/t/week-3-lab-1-errata/408027 "2023-08-04T18:13:05Z")
Section 3.3 has a typo. “Each time you run this cell you’ll see a new set of exammple images.” → example. --- ## [Week 2 Quiz Errata](https://community.deeplearning.ai/t/week-2-quiz-errata/405012)
**Author:** [@ybakos](https://community.deeplearning.ai/u/ybakos)\ **Replies:** 1\ **Last updated:** [August 2, 2023, 6:24am UTC](https://community.deeplearning.ai/t/week-2-quiz-errata/405012 "2023-08-02T06:24:10Z")
Question 3 ends in a typo “addressing a problem?ds”. --- ## [AI for Good - Public Health - MAE for KNN algorithm](https://community.deeplearning.ai/t/ai-for-good-public-health-mae-for-knn-algorithm/402962)
**Author:** [@Bill\_Allen](https://community.deeplearning.ai/u/Bill_Allen)\ **Replies:** 5\ **Last updated:** [August 1, 2023, 1:13am UTC](https://community.deeplearning.ai/t/ai-for-good-public-health-mae-for-knn-algorithm/402962 "2023-08-01T01:13:22Z")
In the Week 3 Bogota air quality exercise, a KNN algorithm is developed to estimate the pollution levels between the pollution sensors. It computes an estimated pollution level for any location in the city by a distance… --- ## [Image cropping and extending](https://community.deeplearning.ai/t/image-cropping-and-extending/392494)
**Author:** [@jlammens](https://community.deeplearning.ai/u/jlammens)\ **Replies:** 3\ **Last updated:** [July 31, 2023, 8:01am UTC](https://community.deeplearning.ai/t/image-cropping-and-extending/392494 "2023-07-31T08:01:20Z")
The image cropping code extends images if necessary with all zero (black) pixels. Might the classifier using these cropped and extended images work better if extensions used gray rather than black pixels? Gray ought to b… --- ## [Errata: Lab: Explore Phase - Distribution of the Wind Power Data](https://community.deeplearning.ai/t/errata-lab-explore-phase-distribution-of-the-wind-power-data/399467)
**Author:** [@ybakos](https://community.deeplearning.ai/u/ybakos)\ **Replies:** 3\ **Last updated:** [July 31, 2023, 6:18am UTC](https://community.deeplearning.ai/t/errata-lab-explore-phase-distribution-of-the-wind-power-data/399467 "2023-07-31T06:18:03Z")
On this page: Learning outcome 6 has some text that runs together, eg “6.1Histograms6.2Box/Violin…” --- ## [Week 2 baseline model](https://community.deeplearning.ai/t/week-2-baseline-model/384929)
**Author:** [@jlammens](https://community.deeplearning.ai/u/jlammens)\ **Replies:** 2\ **Last updated:** [July 29, 2023, 6:32pm UTC](https://community.deeplearning.ai/t/week-2-baseline-model/384929 "2023-07-29T18:32:51Z")
The week 2 baseline model (linear) looks rather like a strawman proposal. There surely are better non-neural models to fit this data that are still simple enough to work as a baseline, e.g. a sigmoid function. I’m not ve… --- ## [Video 2 (Predicting Solar Energy w/ ML) is Awesome](https://community.deeplearning.ai/t/video-2-predicting-solar-energy-w-ml-is-awesome/398010)
**Author:** [@ybakos](https://community.deeplearning.ai/u/ybakos)\ **Replies:** 1\ **Last updated:** [July 26, 2023, 7:14pm UTC](https://community.deeplearning.ai/t/video-2-predicting-solar-energy-w-ml-is-awesome/398010 "2023-07-26T19:14:13Z")
In week 2, the second video featuring Jack Kelly from Open Climate Fix, is excellent. I love the detailed and authentic description of the problem statement of dispatchable generation and the clear description of how AI/… --- ## [Before, after images](https://community.deeplearning.ai/t/before-after-images/396508)
**Author:** [@jlammens](https://community.deeplearning.ai/u/jlammens)\ **Replies:** 1\ **Last updated:** [July 25, 2023, 3:25pm UTC](https://community.deeplearning.ai/t/before-after-images/396508 "2023-07-25T15:25:22Z")
Out of curiosity I looked up some of the damage images in the satellite view of Google Maps by their latitude and longitude coordinates. Not only are those images available, but they are in general also higher resolution… --- ## [Perspectives on AI4good project lifecycle](https://community.deeplearning.ai/t/perspectives-on-ai4good-project-lifecycle/382456)
**Author:** [@jyebes](https://community.deeplearning.ai/u/jyebes)\ **Replies:** 4\ **Last updated:** [July 20, 2023, 2:44pm UTC](https://community.deeplearning.ai/t/perspectives-on-ai4good-project-lifecycle/382456 "2023-07-20T14:44:48Z")
Hello, I was attracted by the AI4good motivation but first 2 weeks of the course are rather generic and high-level with couple of interesting applications but introduced in low level of detail. In my view, the presente… --- ## [Last quiz from week 3 is wrong](https://community.deeplearning.ai/t/last-quiz-from-week-3-is-wrong/389197)
**Author:** [@Ruben\_Fernandez](https://community.deeplearning.ai/u/Ruben_Fernandez)\ **Replies:** 2\ **Last updated:** [July 18, 2023, 1:48pm UTC](https://community.deeplearning.ai/t/last-quiz-from-week-3-is-wrong/389197 "2023-07-18T13:48:39Z")
Question 10 is a true or false question It is configured as a checkbox question, it should be radio button. Both answers, true or false, are marked as wrong, so maximum score is unreachable --- ## [AI4G Course 3: Lecture Notes](https://community.deeplearning.ai/t/ai4g-course-3-lecture-notes/382795)
**Author:** [@Mubsi](https://community.deeplearning.ai/u/Mubsi)\ **Replies:** 0\ **Last updated:** [July 12, 2023, 7:34am UTC](https://community.deeplearning.ai/t/ai4g-course-3-lecture-notes/382795 "2023-07-12T07:34:53Z")
Lecture notes of the C3 - AI and Disaster Management of the AI for Good Specialisation. Note: These slides haven’t been maintained, and that you might find missing topics and incorrect information in them, as opposed to… --- ## [Slides available for download?](https://community.deeplearning.ai/t/slides-available-for-download/381916)
**Author:** [@Damieno](https://community.deeplearning.ai/u/Damieno)\ **Replies:** 3\ **Last updated:** [July 12, 2023, 11:05am UTC](https://community.deeplearning.ai/t/slides-available-for-download/381916 "2023-07-12T11:05:17Z")
Are the slides presented in the videos available for download ? Thanks Damien --- ## [Show more rather than just tell?](https://community.deeplearning.ai/t/show-more-rather-than-just-tell/378016)
**Author:** [@ybakos](https://community.deeplearning.ai/u/ybakos)\ **Replies:** 4\ **Last updated:** [July 12, 2023, 6:50am UTC](https://community.deeplearning.ai/t/show-more-rather-than-just-tell/378016 "2023-07-12T06:50:40Z")
During Week 2 in the AI for Good Framework, it would have been great if we could see an example message and the labels used, be informed about what model was used, and be told exactly how many training records were used. … --- ## [AI4G Course 2: Lecture Notes](https://community.deeplearning.ai/t/ai4g-course-2-lecture-notes/382161)
**Author:** [@Mubsi](https://community.deeplearning.ai/u/Mubsi)\ **Replies:** 0\ **Last updated:** [July 11, 2023, 5:03pm UTC](https://community.deeplearning.ai/t/ai4g-course-2-lecture-notes/382161 "2023-07-11T17:03:17Z")
Lecture notes of the C2 - AI and Climate Change of the AI for Good Specialisation. Note: These slides haven’t been maintained, and that you might find missing topics and incorrect information in them, as opposed to lect… --- ## [AI4G Course 1: Lecture Notes](https://community.deeplearning.ai/t/ai4g-course-1-lecture-notes/382100)
**Author:** [@Mubsi](https://community.deeplearning.ai/u/Mubsi)\ **Replies:** 0\ **Last updated:** [July 11, 2023, 4:10pm UTC](https://community.deeplearning.ai/t/ai4g-course-1-lecture-notes/382100 "2023-07-11T16:10:59Z")
Lecture notes of the C1 - AI and Public Health of the AI for Good Specialisation. Note: These slides haven’t been maintained, and that you might find missing topics and incorrect information in them, as opposed to lectu… --- ## [War as the most tragic disaster](https://community.deeplearning.ai/t/war-as-the-most-tragic-disaster/380682)
**Author:** [@Viktor\_Palchyk](https://community.deeplearning.ai/u/Viktor_Palchyk)\ **Replies:** 1\ **Last updated:** [July 10, 2023, 1:50pm UTC](https://community.deeplearning.ai/t/war-as-the-most-tragic-disaster/380682 "2023-07-10T13:50:16Z")
Which AI tools are available to predict the conflicts like wars considering that they bring the largest socio-economic problems and as result need to be considered with the highest priority? --- ## [Is AI the best solution?](https://community.deeplearning.ai/t/is-ai-the-best-solution/371532)
**Author:** [@ToddB](https://community.deeplearning.ai/u/ToddB)\ **Replies:** 2\ **Last updated:** [July 4, 2023, 9:23pm UTC](https://community.deeplearning.ai/t/is-ai-the-best-solution/371532 "2023-07-04T21:23:35Z")
I don’t know if there is value in posting this, so I’m going to try and if this is not valuable, I won’t do something similar in the future. I’m in Robert Monarch’s AI for Good course. In addition to the course, I have … --- ## [Thanks for all your invaluable feedback!](https://community.deeplearning.ai/t/thanks-for-all-your-invaluable-feedback/74912)
**Author:** [@julia](https://community.deeplearning.ai/u/julia)\ **Replies:** 0\ **Last updated:** [December 13, 2021, 8:47pm UTC](https://community.deeplearning.ai/t/thanks-for-all-your-invaluable-feedback/74912 "2021-12-13T20:47:31Z")
Hi everyone, I just logged in after the weekend and found a long list of issues that many of you wrote, and I wanted to say thank you for taking the time to find and log all these issues! We’re addressing some right awa… [Previous page](https://community.deeplearning.ai/c/course-q-a/ai-for-good/226.md)