Corner Frequency Puns

I have long wanted a ham-friendly trunking mode... The problem, as I understand it, is Legal ID: You never know what frequency you are Transmitting on, so how do you ensure you ID on all of them? M17 takes care of this: Your callsign is the Radio ID embedded in every transmission, so trunking should just be a matter of expanding the protocol...

No one has ever done any of it, but let's discuss the legalities and technicalities rather than hitting it with a prejudice stick...

Given trunking, and a dozen frequency pairs, and a MASSIVE coverage area, one could conceivably assign talk groups to metro areas, and to states, and even to large clubs... Designate a priority (Metro Areas are higher priority than Direct Calls, as an obvious example... But certainly other priority lists could be developed; Certainly, at night, or at other low usage times, enabling Direct Calls would be darn right nifty... Most of the DMR networks prohibit such shananigans, due to lack of space... Let's go up to 900mhz or even 1.2Ghz, put the repeater inconceivably high, and work magic...)

And how inconceivably high? Let's load it up on a geosynchronous atmospheric blimp at 60-65,000 feet, somewhere in the vicinity of the midpoint between Seattle, WA and Pheonix, AZ... Distance to the Horizon at that height is ungodly... Only have to worry about refraction and deflection of the atmosphere itself...

Sounds like fun! And if we are only launching one, it isn't as insane as Google's failed Loon project...

So: Am I the only one that thinks this idea is mega awesome and worth throwing my allowance at for the rest of my life?

Paraphrased from here

but restated on wikipedia as: "Weighting the distortion wave-form proportionally to the square of the frequency gives a measure of the reciprocal of the radius of curvature of the wave-form, and is therefore related to the sharpness of any corners on it."

If I have the 3rd harmonic sin(3pix), differentiating twice is -9pi^2 sin(3pix) which is proportional to the square of the harmonic number but what is "the reciprocal of the radius of curvature of the wave-form"? The original text talks about the square but the wikipedia quote says the reciprocal of the square. Is wikipedia wrong? What even is the radius of curvature of a waveform in this context and how does sharpness relate to the square of the harmonic number?

Hi, I want to remove the instrument response as a part of surface wave tomography.But I would like to know the selection criteria of f1,f2,f3 and f4 values. I have different sensor data with different flat response ranges. Is there an thumb rule to select these frequencies? Please Help me to understand more about the quantification of this frequency values. Thanks. (With SACPZ files provided)

So what's the formula of a 4th order Sallen-Key low pass filter? It's just two 2nd order active low pass filters cascaded.

And here given transfer function of a 2nd order LPF.

https://preview.redd.it/o5owwk0rpoz41.jpg?width=5120&format=pjpg&auto=webp&s=814b5945dedcb4c45f7e254287c8f2008e2abc7d

The corner frequency of the first two order filter is per formula. Here's screenshot.

fc1 = ~10.7Khz

And since second cascaded filter is the same as the first one, it should have the same corner frequency... But the RC time constant of the first second order function (U1) is affected by the resistors R4 and R3 that act as the load, right?

Ltspice says out2 corner frequency is ~9.284Khz.

What's the formula for corner frequency at out2?

For a lab at uni we've been required to design an active bandpass filter using a low pass and a high pass filter in series. Unfortunately because of the current pandemic we don't actually build anything now and instead are designing everything on computers and then using equations to simulate output value for a range of frequencies. For the high pass filter this all turned out fine, gain is correct, cut off frequency is where it should be, etc. However for the low pass filter it seems to be quite off. The capacitor value we were told to use was 47pF and the corner frequency 11kHz, which from that I could get a value for the feedback resistor of 308k, and knowing the gain to be 33 I could calculate the input resistor to be 9.3k. All this should in theory give an amplifier with a gain of ~30dB in the pass band and ~27dB at 11kHz, however the results from the table seem to be showing a 3dB drop from the peak gain at around 5kHz, and <24dB at 11kHz. Am I doing something wrong? At this link you can find the design, frequency response table and the equation I used to get my values. Am I going wrong somewhere? I tried using a different equation that someone else derived but seem to get similar results. Is there something we've both managed to forget to take into account?

TL;dr fc=11kHz (what it should be) C=47pF Rf=308k Rin=9.3k Actual fc=~5kHz Gain @ 11kHz=~24dB

I came across the following text:

"A high pass filter with corner frequencies of 0.5 and 5rad/s"

The transfer function they are talking about is:

100(jw + 0.5)^2

----------------------

(jw + 5)^2

Frequencies wise, i thought high pass filters only have one number..the lowest frequency it lets through.

So what do two numbers describe in this instance?

It starts as distortions out of the corner of your eye. little flickers of movement, something that seems a little out of place, a sensation of being watched. Then you start finding little tiny clawed footprints all over the place. The little visual ticks become tiny shadow demonpeople, who eventually come for you and kill you etc.

This story literally broke me as a small child. I think it gave me some sort of condition for years. I started questioning visual ticks and I couldn't sleep for months... it was great! The whole thing hinged on the idea that they wouldn't come for you unless you were already aware that they existed, which of course the story explains. Then at the end you see a little twitch of black movement in the corner of your eye...

I've read an ST Micro AN link

I've also looked at a few different schematics for the BIS0001 IC, and the first stage seems to be 7.95 (8) Hz.

That's a small difference, but a difference nonetheless, which got me thinking:

1. How do you choose the high-pass filter freq based on application?

2. What are the parameter limits/criterion/etc. for determining this frequency.

In the ST AN, it states " The cut-off frequency is 5 Hz (fhigh1 = 1/(2 x π x R1 x C1)). This application does not need to work at higher frequencies because usually we are detecting human motion."

So, if one assumes the above condition to be true, then shouldn't we also be able to say that, in order to detect some motion that is not human, we would need the filter to cut-off at a higher frequency.

What motion then, from what? Why is a higher cutoff freq required? How high?

Can anyone shed some light on this for me?

Ever since I was a kid my Dad has sworn by the logic that sub frequencies, when played from a subwoofer about 8 inches away from the corner of a room, allows for the sound to spread around the room more easily. Having picked up EDM production as a hobby two years ago, I've read a handful of books and magazines and watched countless hours of Youtube to learn more about production and audio engineering. So far I haven't stumbled upon any information that endorses this kind of technique... and my father's claim that Bose stereo systems are superior to others makes his theory on subwoofers all the more doubtful for me (that's an entirely different topic, though). Can anyone explain to me if this works?

> **EDIT: My father and I are spending some rare "quality" holiday time together and can't stop bickering about sound quality. Thus this argument began...

Ive been thinking about this and couldnt find a logical explanation if anyone has a good explanation id really appreciate it.

Frequencies**

HITMAN 3 Year 2 Reveal Blogpost
HITMAN 3 Year 2 Reveal Stream

HITMAN 3 – Year 2 starts on 20 January 2022 and we’re excited to reveal more of what we’ve been working on.
Watch the full Year 2 Reveal Stream now for all of the announcements, reveals and never-before-seen footage of new content coming to the World of Assassination in 2022. Then, read on for more details.

Elusive Target Arcade
Release: January 20

Elusive Target Arcade is a brand new game mode that takes the Elusive Target concept to the next level, mixes up the formula and introduces new challenges and unlockable rewards – all whilst keeping the essence of what makes Elusive Targets exciting and interesting to play.

There are several significant chances to the mode here: Each Arcade Contract now tasks you with taking down consecutive Elusive Targets, one contract after the other. Each one must be completed to proceed to the next – and there are additional complications added to the contract as well.

https://preview.redd.it/e16q7c1z6hb81.jpg?width=1536&format=pjpg&auto=webp&s=3c9b611da455fd9d2c87b9c5d95cdebf60be3dc4

If you fail an Arcade Contract at any point, there will be a 12-hour lockout before you can retry the contract again from the start. This lockout enables us to keep the high-stakes gameplay that is a hallmark of Elusive Targets, whilst also giving players a clear indication of when they are able to play a particular Elusive Target again.

Crucially, Arcade Contracts are permanent additions to HITMAN 3. Once we add one to the game, they won’t go away.

Our aims with this game mode are; to give players the chance to engage and play Elusive Target content more frequently, provide a new challenge for long-time players in the Elusive Target game mode, create a new type of recurring content that will reward players with desirable unlocks.

https://preview.redd.it/bfgga4l17hb81.jpg?width=1536&format=pjpg&auto=webp&s=d416eed1613f6a24b82e370f92cb121a2f588e4c

When HITMAN 3 – Year 2 begins on January 20, the Arcade will also be open with a total of 3 Arcade Contracts, each one with Elusive Targets from a specific game in the World of Assassination trilogy. As you can see in the screenshot, the Ellipses Arcade Contract has three targets from HITMAN 3. Two other Arcade Contracts will also be available on January 20 with targets from HITMAN 1 and HITMAN 2 respe

Once again I've enjoyed a few beers and whilst perusing Reddit and reading TFTS awesomeness I felt drawn to regale y'all with another tale from my past.

For a few years I worked for a large telecom company in the US who delivered IPTV, internet, and voice over their circuits. It was my bridge from retail to the real IT work I do today, and while I detested climbing poles, attics, and crawling under houses, I rather enjoyed the work. I have the innate skill of "following the wire", as with any wired circuit with an issue, no matter what tools you have at your disposal the real work was chasing it down and knowing where to look and what to look for. I wasn't the top technician by numbers but I WAS the guy managers would call out to deal with escalations.

This job was one of those. A guy who'd had our service for a few years once again had intermittent issues. My favorite. Unless it went out of service (OOS) while I was there, there was very little I could do besides inspect and test every segment of the wire path I had access to. I told my manager as much, he said to just do the best I could. Fine, whatever, hopefully waving my magic wand works today.

I call ahead, do my usual remote tests, of course everything looks perfect right now. Drive down, knock on the door, introduce myself. Tell him my manager sent me out specifically to deal with this problem. The guy laughed. "Let me show you how many of y'all have been sent here to do precisely that." He opens a composition book and shows me a list of technician names, IDs, dates, and times. "You mind signing in?"

I honestly laughed in absurdity. Shaking my head, I write my own name, ID, today's date, and the time on my watch. When I'm done I count, and there were 32 other names above mine, dating back over the last four years. "Sir, unless I'm mistaken, you've had issues with our service ever since you've had it installed. Why the hell are you still with us?"

"Well, I LOVE the service when it works, which is most of the time. I'll never go back to cable. When it doesn't it is annoying, of course. Something is wrong somewhere, and I figure if I keep calling enough eventually someone will figure it out and fix it."

My company was never going to recoup the money they've spent trying to fix this customer's service, even if he was subscribed without another call for the next fifteen years. Nevertheless, I liked a challenge, so I decided to do my thing.

What I found was the most immaculate install I

Source: https://www.bungie.net/en/News/Article/50829

This week at Bungie, we take a look at every grain in the abilities sandbox.

Hello, and welcome to another sandbox-focused TWAB. If you’re new around these parts, you may be asking, “What’s a sandbox?” — well, it’s complicated. It's split between the weapons you use, the armor you equip, the perks and mods that you hunt for, and the enemies you face. Let's be real; the Destiny 2 sandbox is broad. Last week, we focused on the weapons sandbox and what changes are planned for December 7. This week, we’re taking a pass on the abilities your Guardian possesses. Think Supers, Melee's, Grenades, Class abilities. I highly recommend you grab a glass of water and maybe even a snack, because we've got a pretty lengthy update for you to read.

Before we dive into the details, it’s customary to have a TWAB intro discussing what’s going on in the realm of Bungie and Destiny. Let’s keep this short and sweet, shall we?

• Our 30th Anniversary is out on December 7, which just so happens to be 19 days from the publication of this blog article.
• In-game, there’s still plenty to do between Seasonal Challenges, Trials of Osiris, the occasional Iron Banner, vendor reputation, god-roll hunting, and more.
• Next Thursday is Thanksgiving here in the states, and many of us will be taking some time to rest up and spend time with family.
• As such, expect a very light TWAB next Wednesday.

Alright, Sandbox time. Let’s get to it.

There are buffs, there are nerfs, there are tuning levers that we’ve recently unlocked with back-end changes, there are clear separations between PvE and PvP... and more.

There is a lot going on here, so don’t feel bad if you scratch your head wondering how these upcoming changes will feel. If you find anything a bit confusing, please sound off with questions! We’ll clarify as we can on our forums and social spaces. With all that preamble out of the way, I'll finally shut up and pass the mic over to the team.

##New Legends Will Rise

Image Link^^^imgur

Hey all, Kevin Yanes here to give you a quick intro before I hand off to fellow designers Eric Smith and Mike Humbolt. A few TWABs ago I gave a brief roadmap leading towards our 30th Anniversary, The Witch Queen, and beyond. A new roadmap u

I made a super simple animation to explain the principle of acoustical absorption of (mainly) high frequencies. Very curious for your feedback!

https://www.youtube.com/watch?v=f6vzwujRm_Q

Hope it will help novices understand the basic principle without getting into too much detail.

Do your worst!

I work for Stitchfix in their warehouse… when I tell you this place is an absolute nightmare to work for, I mean it.

They allow sexual predators and violent people with RECORDS to work here, they allow sexual harassment and tell their employees that “it can’t be proven so we aren’t doing anything but name dropping you to this person to slap them in the wrist.”

They don’t care about their employees as they say, it’s to sucker you into working here. In ONE warehouse in Atlanta, GA there have been supervisors sleeping with 16+ employees, leads who harass you and slaughter your name with leadership because you rejected them as “relationships are allowed”. Been dealing with my sexual harasser for 6 months (I’ve been applying at other places this whole time but they put data blockers up so you can’t make calls).

This place is NOT a safe place to work.. they are trying to replace their employees with technology because turnover is insane due to negligence on the company and management. They only care about what they can legally get away with versus what is morally right to the human beings working here.

People are stalked daily by females/males who don’t take “no” as an answer. They allow leadership to keep doing these things even though multiple people have reported sexual misconduct or harassment.. people are officially filing with EEOC as they “can’t prove sexual misconduct” even though they have “cameras all over the warehouse.” A member of leadership was filed against due to raping an employee and he is still here..

Please for the sake of your sanity and safety, never ever work here and sure do not allow your wife or adult children to work here.. this company really needs to be shut down immediately..

This post will NOT cover everything that took place in GamerGate. That simply isn't possible here. GamerGate wasn't one drama, it was many small and large events that unfolded and built upon each other over a period of years, and took place in every part of the internet at once. My aim here is to lay out the key figures, and give a general understanding of what happened and why. There are resources linked throughout the post which can expand on events I mentioned, but there are many more that I left out.

Come with me as we explore the dark corridors of the internet that gave birth to the modern alt-right. I'm going to try and keep this gaming related, because this isn't a political discussion board, but references to greater political movements are unavoidable.

Be warned, this post contains basically every ism and phobia that you could possible imagine. Tread with care.

Also, when I refer to 'gamers' with a lowercase G, I just mean normal gamers as a whole. When I say 'Gamers', I mean Gamergate supporters.

#Anita Sarkeesian - Sexism in Gaming

This shitstorm began in 2013, though its roots trace back far earlier, and while it would come to suck in thousands of pundits, politicians and thinkers from around the world, it began with one woman: Anita Sarkeesian.

Anita is a Canadian-American media critic. She started her Youtube Channel Feminist Frequency in 2009, analysing portrayals of women in pop culture. In 2011 she worked with feminist magazine Bitch to create a series of videos titled 'Tropes vs Women', which examined the damaging cliches and stereotypes against women in film and tv. It did pretty well, but she was still a small voice in a small circle. The natural next step was to talk about games, and that's what she did in 2012. 'Tropes vs Women in Video Games' criticised the sexualisation of women in games, the way they are treated as helpless damsels in distress, or given to the player as a reward. As Sarkeesian herself points out in her first episode:

>"It's both possible and necessary to simultaneously enjoy media, while also being critical of its problematic or pernicious aspects'.

The videos were pretty even handed, and never really took the 'rabid angry feminist' tone that people ha

First big pulling session since the rerolls for me and wow... If you get a 3 stars it most definitely will not be of the rate up character.

I thought that my biggest fear would be not getting 3 stars with a good frequency but good god the "rate up" does not have any mercy on you.

Now im gonna take my useless duplicates and soak in the corner if you excuse me

Hi all, I have just moved into a new apartment and I need some help with acoustically treating my new workspace. The room measures 370w 590L 350h with a single door at one end, windows and a glass door at the other end (covered by curtains) and a double door in the middle of another wall. There is also a defunct big old heating oven in one corner.

The room will also double as a guest bedroom (with a foldout couch) so my work space will need to be on the balcony window side.

I’d like to treat the room as much as possible, keeping in mind that it will also have some general family usage. On that note, I’d like to create some sort of movable vocal booth/ live recording setup.

I’d like to keep things as DIY/affordable as possible. Any help or suggestions would be amazing.

Pics of the room: https://imgur.com/a/y65kyx5

Thanks!!

For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.

I said "hey look, an escaPEA"

No one near me but it didn't half make me laugh for a good hour or so!

Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies 😂

It really does, I swear!

(tl/dr on the bottom)

g'Day!

- Before clicking "POST" edit: This turned out to be a longer post than I initially thought it would be, but if you have felt the "something is off with the servers" feeling, I highly recommend you read this. It's mainly my Point of View and my take on how I perceive it, but chances are you might recognize some -or all of it.

First off, some introduction to why I'm creating this post with a slight touch 'o knowledge and experience. I mainly play Competetive (deathmatch/range to warm up, Spike Rush sometimes Unrated once every blue moon) Overall rank is in the Diamond spot, varying from Immortal to Dia2-3.

As thousands of others, I too, granted access quite early in the Closed Beta drops on Twitch. From somwhere in the mid-range of "Project A", I followed closely as I've played CS since 1.3 and always loved the 5v5 tactical shooter scene. Valorant, as it turned out to be, was highly anticipated and I immediately fell in love with the game from day 1. The concept, the vision from the devs (although pleasing a growing community of computer-gamers is straight up impossible) to the pure performance of a game in it's very early stages. Point being; I've spent a great amount of time playing Valorant. Throughout it's short life this far, I've played on a total of 3 different computer systems which yields some "feel" of how it is to play on low, mid and high end computers which, again, leads into the nature of this post:

- Something, is, off. Seriously off. We're not talking about the everyday "having a bad day" off, we're talking fundamentaly wrong. And it seems to be affecting alot of people. Not everyone, but more than "just the few unlucky ones"

In the very first release of Closed Beta, the game had it's hitches. But performance? Holy moly, it was 1:1 true raw gunfight galore. Then patch v0.50 hit, and so did my FPS. And yours too. And the next person. Everyone shat frames after v0.50. Fair enough, the devs narrowed it down to be some sort of assets/decals of bulletholes were printed on the wall loaded in and some agent's (*cough*sage*cough*Viper) abilities were deployed. Nevertheless, it was patched pretty quickly and we all lived happily ever after.

Further patches had some network tweaks to them. And I remember this, because it introduced a very weird yet neat rubberband to occur whenever I would hug a corner and jiggle-peek quickly to obtain fast information about enemies' whereabouts. If nobody was there, I

They’re on standbi

As we saw time and time again in the Bengals game (side note: imagine your team culture revolving around a speech impediment), DPI invites the most disproportionate officiating influence in maybe all of professional sports.

To end the Texans first half, a Texans corner tracking the ball the whole way, and is subsequently laid out the Titans wideout. By some miracle this results in DPI, and rather than a 4th and 8 from the 50 the titans are handed the ball on the 5 yard line.

The Texans weren’t going to win this game, but the product of the game is ruined by plays like this.

What can be done? This a multi-billion dollar industry, every scoring play is reviewed impartially - why can’t they similarly review controversial DPI? Or any DPI over 15 yards? The frequency is basically the same as TDs, if not less. We saw the farcical experiment of making it “reviewable”, and the refs will never overturn themselves. Take DPI upstairs where it belongs.

EDIT: the Texans very well may have won that game lol

You go in thinking I’m gonna get lit and get laid. You take some molly cuz that’s just what you do at raves. You go in, not really knowing what to do or what the hypes about, some people seem to be having way too much fun though. You start getting these chills, and the sound of the beat reminds you of a time when you were younger and nothing mattered. Within seconds the music makes sense. So this is what ravings about. You feel connected with everyone in that room, you check out different sets, you feel unstoppable. But soon enough, the party is over and your heart drops. You are coming down. The whole thing is just a sham. The musics getting kind of obnoxious now. You weren’t really connected to and of those people or that music, it’s just from the happy chemicals that mdma gave you. Fuck it. You find some dude chillin in his corner and take a seat next to him, and soon enough, he offers you a line of ketamine. He tells you it’ll make you feel better. Sure. You feel kinda spaced out and wavy, whatever to take the edge away, and yeah, you do feel a lot better. You have a slightly different perspective. Then you get handed a balloon, and you’re told to inhale it. You inhale it. It starts with your head falling out of your skull. You still hear the music and everyone around you, but you seem to have gone to some place that is intimately close to where your physical body is, but not quite there. The music is more powerful, more invigorating than ever. The party never stopped. The party NEVER stops. Every single person at this party, every single person in the world, chooses to wake up every morning. Because they have something to live for. No matter how much a person thinks they have it all figured out, all it takes is one person, or one experience to change that. There is a powerful music reverberating through every corner of the universe. This music is the hardest banger you have ever heard but more intricate than Bach. This party has been happening since the conception of the universe and there’s a good chance it will never end. The music from the dj set isn’t being emitted from the dj, rather they are tuning into a frequency that has always been there. These drugs aren’t adding anything to you, they’re just revealing something that, again, was always there. And it will always be there with you. And it’s called love. It’s the only way things could be.

Pilot on me!!

Source: https://www.bungie.net/en/News/Article/50864

This Week at Bungie, we talk 30th Anniversary release, Moments of Triumph, Trials Labs (Freelance), and QOL updates!

Welcome to our final TWAB before the 30th Anniversary release. It’s an exciting time. Just a few more days stand between you and some fresh Destiny 2 experiences. We have some fun news to get through today, so let’s get to it! We’ll start you off with a recap of our Game2Give Charity announcement, some news on Trials: Freelance, and then a few fun patch notes previews.

##Third Annual Game2Give Charity Event!

Earlier today, our 3rd Annual Game2Give charity event kicked off! Between December 2 and December 15, we’re inviting the Bungie Community to join us in celebrating what we can accomplish together through games and generosity. This year, we have a wonderful stream marathon (which you’re also invited to participate in), and a few awesome charity rewards for you to receive as a thank you for your donations.

Hi-5 Heart Exotic Multiplayer Emote

Video Link

Altrux Pura Mk1 Exotic Ship

Image Link^^^imgur

We’re also planning some fun for a Bungie block to end the livestream marathon, so stay tuned for even more awesome announcements. Thank you, again, to all Guardians who’ve been doing their part to support the world at large. We’re excited to see what we can accomplish together through this charity event, and even further beyond.

Sign up to fundraise or donate today, and follow the event on Twitter, Instagram, and Facebook!

##Trials Labs: Freelance

This weekend brings another round of Trials Labs to Destiny 2. While Freelance will be familiar, we also have a minor change to access requirements to get into Trials for the first time. Here’s a quick rundown from the team on what to expect:

> >Team: Hey all, we’ve got some Trials of Osiris quick hits ahead of the December holida