EARS | EARS : Environmental Audio Recognition System

I have a basic e-commerce app for practice. There's a functional component called "Shop" which has two states:

I'm not sure if the title makes sense, it was the best I could come up with, so here's my scenario.

I have an ASP.NET Core app that I'm using more as a shell and for DI configuration. In Startup it adds a bunch of IHostedServices as singletons, along with their dependencies, also as singletons, with minor exceptions for SqlConnection and DbContext which we'll get to later. The hosted services are groups of similar services that:

1. Listen for incoming reports from GPS devices and put into a listening buffer.
2. Parse items out of the listening buffer and put into a parsed buffer.

Eventually there's a single service that reads the parsed buffer and actually processes the parsed reports. It does this by passing the report it took out of the buffer to a handler and awaits for it to complete to move to the next. This has worked well for the past year, but it appears we're running into a scalability issue now because its processing one report at a time and the average time to process is 62ms on the server which includes the Dapper trip to the database to get the data needed and the EF Core trip to save changes.

If however the handler decides that a report's information requires triggering background jobs, then I suspect it takes 100ms or more to complete. Over time, the buffer fills up faster than the handler can process to the point of holding 10s if not 100s of thousands of reports until they can be processed. This is an issue because notifications are delayed and because it has the potential for data loss if the buffer is still full by the time the server restarts at midnight.

All that being said, I'm trying to figure out how to make the processing parallel. After lots of experimentation yesterday, I settled on using Parallel.ForEach over the buffer using GetConsumingEnumerable(). This works well, except for a weird behavior I don't know what to do about or even call. As the buffer is filled and the ForEach is iterating over it it will begin to "chunk" the processing into ever increasing multiples of two. The size of the chunking is affected by the MaxDegreeOfParallelism setting. For example (N# = Next # of reports in buffer):

• N3 = 1 at a time
• N6 = 2 at a time
• N12 = 4 at a time
• ...

• N6 = 1 at a time
• N12 = 2 at a time
• N24 = 4 at a time
• ...

• N12 = 1 at a time
• N24 = 2 at a time
• N48 = 4 at a time
• ...

• N24 = 1 at a time
• N48 = 2 at a time
• N96 = 4 at a time
• ...

This is arguably worse than the serial execution I have now because by the end of the day it will buffer and wait for, say, half a million reports before actually processing them.

Is there a way to fix this? I'm not very experienced with Parallel.ForEach so from my point of view this is strange behavior. Ultimately I'm looking for a way to parallel process the reports as soon as they are in the buffer, so if there's other ways to accomplish this I'm all ears. This is roughly what I have for the code. The handler that processes the reports does use IServiceProvider to create a scope and get an instance of SqlConnection and DbContext. Thanks in advance for any suggestions!

I have some troubles while trying to reproduce different frequencies using two different audio channels (left and right) in JavaScript. I've been searching in StackOverflow and Internet for a while, but I didn't find anything that could help me, so I decided to ask here for help.

Let me explain first why I'm doing this. There's a lot of people in the world that have tinnitus (an "illness" where you hear a specific frequency in an ear or in both). Sometimes, people sat that tinnitus is not a big trouble. The website is gonna allow the users to know how a "tinnitus person" hear. For accomplishing that, the audio must be different in both ears, so I need to send different frequencies in two different channel audio.

This is the code I already have, it reproduces a specific frequency in mono (full app here: replit.com/Tupiet/hearing):

Past few days I've been developing a commenting system UI using Quill and Github API and after the initial part's done (i.e. the comments loading) I'm working on the UI for the comments replies (also with QUill):

I have a large amount of books and I want to build a database to manage them. My idea is to scan all their barcodes, put them in Google Sheets then use OpenLibrary API to retrieve the corresponding meta data (title, authors etc.) to avoid typing it all in.

The API structure is simple enough and I'm able to retrieve the information by passing over the barcode (ISBN number):

Hello fellow programmers,

For a project I want to generate a stacked bar chart plot. I was succesful at this. However, I want to add a label to every bar to indicate the size of each bar. I read the demo on the fairly new added function to matplotlib called the bar label: Bar Label Demo.

The solution I tried to come up with is as follows:

Using Choregraphe, I am building an app for NAO. I need to turn his LED eyes to different colours but whenever he is "listening" to me his eyes and ears automatically turn blue. How can I stop that from happening?

P.S. I am using a Dialog box to manage all his actions. P.S.2.0 Autonomous life HAS to be kept on.

I have created a google sheet and have set up protections that restrict users to checking/unchecking a single cell. When they check or uncheck the cell, it shades data found in the same sheet. ie. numbers >90% shade dark green. numbers >80% shade light green. etc.

This, of course, works fine on my end because I don't have any protections in place for myself. However, I just realized that the users can't use the checkbox to shade cells that are protected. They are able to check/uncheck but the code in onEdit won't shade for them like it does for me.

When I first made the doc, I had set it up for conditional formatting so it would take care of it automatically. However, this made the sheets slow down as it could be shading anywhere from 50 to 300 cells in a page. (Each page has a different number of cells.) I could go back to this if I have to. If there's a way to speed that up, I'm all ears.

However, I'm hoping someone out there can help a noob figure out how to protect the cell so the user can't edit it but let the shading work as described in the first paragraph.

Thoughts?

Sandi

Edited:

Here's the code that is activated through onEdit when a user checks the "shade" cell: (I'm sure there's a better way to write the code...but still learning and kind of hacking my way through...)

I have been experimenting with partitions and repartitioning of PySpark RDDs.

I noticed, when repartitioning a small sample RDD from 2 to 6 partitions, that simply a few empty parts are added.