Erica Calman
Erica Calman
  • Видео 193
  • Просмотров 310 801
The Sad Story of Why TCAS Exists: PSA Flight 182
In 1978 a fatal mid-air collision occurred over north park in San Diego when a boeing 727 collided with a cessna 172, all occupants of both aircraft along with several people on the ground died. Today flying is safer because of the lessons learned and now all airliner use TCAS en.wikipedia.org/wiki/Traffic_collision_avoidance_system
en.wikipedia.org/wiki/Pacific_Southwest_Airlines_Flight_182
www.ntsb.gov/investigations/AccidentReports/Reports/AAR7905.pdf
Просмотров: 162

Видео

Why Isn't There An Eclipse Every Month?
Просмотров 19214 дней назад
Since there's another pair of eclipses coming up (a partial lunar and an annular solar) I thought I'd talk about why eclipses occur with the frequency they do. It's mostly a consequence of the moon's orbit not being in the same plane as the earth's orbit (the latter of which is referred to as the plane of the ecliptic for precisely this reason). As always please let me know if you have any ques...
I'm Technically A Professor Now!
Просмотров 74Месяц назад
I'm teaching at a community college and I am already worried I'll mess it up but things seem ok for once.
When is An Entropy Increase Irreversible? The Case of Free Expansion
Просмотров 73Месяц назад
This is just a brief follow up on my previous entropy and engines videos while I work on an upcoming video about jet engine thermodynamics. I compare adiabatic, isothermal and free expansion of an ideal gas. Free expansion resembles isothermal expansion, but the entropy increase of the gas is reversible for an isothermal gas but is irreversible for a free expanding gas (ie expanding into a vacu...
Why There Are No Pink Lasers
Просмотров 2,2 тыс.3 месяца назад
Why There Are No Pink Lasers
Air Conditioners are Backwards Engines
Просмотров 2893 месяца назад
Air Conditioners are Backwards Engines
A Practical Guide to Entropy and Thermodynamics
Просмотров 3104 месяца назад
A Practical Guide to Entropy and Thermodynamics
Why Is There A Helium Shortage?
Просмотров 1807 месяцев назад
Why Is There A Helium Shortage?
What Does Relative Humidity Actually Mean? Psychrometrics, Ideal Gases and Partial Pressures
Просмотров 1147 месяцев назад
What Does Relative Humidity Actually Mean? Psychrometrics, Ideal Gases and Partial Pressures
2023 Recap: Factual Errors I Made and Other Thoughts
Просмотров 639 месяцев назад
2023 Recap: Factual Errors I Made and Other Thoughts
Dogfight Physics 101: Airplane Turn Rate vs Turn Radius
Просмотров 1,1 тыс.9 месяцев назад
Dogfight Physics 101: Airplane Turn Rate vs Turn Radius
Luminescence vs Incandescence
Просмотров 18010 месяцев назад
Luminescence vs Incandescence
Visiting New Mexico
Просмотров 3510 месяцев назад
Visiting New Mexico
Stealth and Electronic Warfare
Просмотров 23011 месяцев назад
Stealth and Electronic Warfare
Mental Health In Aviation (and In Life)
Просмотров 4711 месяцев назад
Mental Health In Aviation (and In Life)
How Rollerons Actually Work (Gyroscopic Precession)
Просмотров 518Год назад
How Rollerons Actually Work (Gyroscopic Precession)
Why can't neutrinos be the dark matter?
Просмотров 141Год назад
Why can't neutrinos be the dark matter?
Science and Science Fiction
Просмотров 62Год назад
Science and Science Fiction
Gyroscopic Precession
Просмотров 287Год назад
Gyroscopic Precession
More Depression (But Soon Angular Momentum I promise)
Просмотров 100Год назад
More Depression (But Soon Angular Momentum I promise)
Being a Transgender Physicist
Просмотров 307Год назад
Being a Transgender Physicist
What Is Condensed Matter Physics?
Просмотров 8 тыс.Год назад
What Is Condensed Matter Physics?
Mia Mulder and The Military
Просмотров 98Год назад
Mia Mulder and The Military
Free and Open Source Physics Education Tools
Просмотров 126Год назад
Free and Open Source Physics Education Tools
Palomar Airport: Why Landing on a Pile of Garbage is Awesome
Просмотров 2,1 тыс.Год назад
Palomar Airport: Why Landing on a Pile of Garbage is Awesome
I'm a Pilot (more pontificating on identity, I'll do a proper aviation video later this week)
Просмотров 105Год назад
I'm a Pilot (more pontificating on identity, I'll do a proper aviation video later this week)
All Reactions Turn Mass Into Energy, Not Just Nuclear Ones
Просмотров 107Год назад
All Reactions Turn Mass Into Energy, Not Just Nuclear Ones
I'm a Scientist
Просмотров 119Год назад
I'm a Scientist
Sadly SmarterEveryday is Mistaken, Glass Melting is Not a Second Order Phase Transition
Просмотров 758Год назад
Sadly SmarterEveryday is Mistaken, Glass Melting is Not a Second Order Phase Transition
Why Landing at San Diego's Airport is So Hard
Просмотров 15 тыс.Год назад
Why Landing at San Diego's Airport is So Hard

Комментарии

  • @datainmotion
    @datainmotion 4 часа назад

    "I fly flight simulator, so I'm an expert".

    • @EricaCalman
      @EricaCalman Час назад

      @@datainmotion never said I was. whether something is “hard” is a bit subjective but as far as I can tell nothing I said is factually inaccurate (except for narration errors corrected by onscreen text)

  • @EricaCalman
    @EricaCalman 4 дня назад

    Also turns out the new memorial plaque was installed just this year, the very same day I uploaded this (and ~3 days after I recorded it) timesofsandiego.com/life/2024/09/25/memorial-plaque-dedicated-on-46th-anniversary-of-psa-182-crash-in-north-park/

  • @tishherbert6403
    @tishherbert6403 4 дня назад

    Greatest in the world!! (I grew up as Navy "brat"). ❤❤❤❤❤

  • @krugerfuchs
    @krugerfuchs 4 дня назад

    I don't think it was the crews fault totally I think it was more atc and the cessna the memorial thing is sad and in aviation it seems years before crashes get them like eastern 401 or valujet and the smiling face on the plane is a killer great video

    • @EricaCalman
      @EricaCalman 4 дня назад

      Well at least one person at the NTSB agreed with you because the initial report placed almost all the blame on the PSA crew but a subsequent revision included a dissenting opinion that it was a plurality of factors including the PSA crew's actions but also ATC's action, the Cessna's failure to maintain heading and above all else the way the ATC system as a whole operated at the time.

  • @strelkomania
    @strelkomania 12 дней назад

    this is super cool! how did you make it ?

    • @EricaCalman
      @EricaCalman 12 дней назад

      Well sadly the hard part has to come from commercial off the shelf diffraction grating that I just bought (although it is cheap). The grating by itself though will overlap horizontal images with their diffracted copy so to get discernible emissions lines it needs and entrance slit. So I 3D printed a little slide holder to mount the grating in and the glued some black poster board around it and cut a narrow slit at the front and on the right to make the apparent position of the first order diffraction in the center when looking into it.

  • @mattewert6980
    @mattewert6980 13 дней назад

    Have you flown a real a320 and b737 with similar flight hrs? What are you basing your opinion on which is the better aircraft?

    • @EricaCalman
      @EricaCalman 13 дней назад

      @@mattewert6980 general consensus, they are both good airplanes. As a loose rule of thumb Boeing makes better long haul airplanes and airbus makes better short haul but they obey the same laws of physics and have customers that pay for the same type of fuel so there’s a lot of convergent design. More people seem to prefer a 320, I actually like the 737 better but a lot of people like side stick and a320 is usually a tiny bit more efficient for the same range and cabin layout.

  • @SaanMigwell
    @SaanMigwell 15 дней назад

    I mean techinically the Lunar cycle is just one 28 day long lunar eclipse.

    • @EricaCalman
      @EricaCalman 15 дней назад

      Not quite, 50% of the moon remains illuminated during the entirety of a lunar cycle it just isn't always the side facing the earth. Every new moon is just when the far side is illuminated. During a lunar eclipse the entire moon is in shadow as the far side is facing away from the sun the same way it is during any full moon ant the near side is occluded during the eclipse.

    • @SaanMigwell
      @SaanMigwell 15 дней назад

      @@EricaCalman Right, I knew that. I confused the two things way back in school as well. Phases are caused by alignment, eclipse are caused by shadow.

  • @behaviorallogic
    @behaviorallogic 17 дней назад

    I learned things! And nice version of Claire de Lune.

  • @gerardmoran9560
    @gerardmoran9560 19 дней назад

    I did plenty of approaches and landings at SAN. Not an especially challenging airport, despite terrain on final. It's annoying to think that local officials permitted the construction of a garage in the flight path that resulted in a displaced threshold eliminating otherwise useable runway.

  • @nathanrooney2027
    @nathanrooney2027 19 дней назад

    I did my first two years of college at community college. I’m studying a dual major in electrical engineering and physics now at a 4 year school. I enjoyed my time at cc a lot, and it was because of all the great professors. I’m sure you’ll be appreciated by your students.

  • @mangeload
    @mangeload 25 дней назад

    You're smart. We like you as you are. Don't ever change.

  • @mangeload
    @mangeload 25 дней назад

    No way! dude!

  • @pit8274
    @pit8274 25 дней назад

    girl u hav a nice voice and i rlly liked ur demonstration, i think u could benefit from either using graphics or a better camera / lighting thoug

    • @mangeload
      @mangeload 25 дней назад

      Your voice gets horse when you are running out of oxygen

    • @mangeload
      @mangeload 25 дней назад

      She just needs some air

    • @mangeload
      @mangeload 25 дней назад

      I'm sorry for the insensitivity. I had no idea.

    • @EricaCalman
      @EricaCalman 25 дней назад

      Yeah I’m operating on a $0 budget and just using my phone camera lol, normally fine but it can get out of focus like here

  • @AdamAdam-di9bo
    @AdamAdam-di9bo 27 дней назад

    You are correct sir

  • @ChrisCrosdale
    @ChrisCrosdale 28 дней назад

    Not recommended this for real air traffic, but in MSFS you can sort of cheat the system because there is a GPS waypoint ("ZOLPA") right on the Runway 27 threshold. However, you need to have more altitude than the required minimum at the previous waypoint ("REEBO") of 2000ft to get the right glideslope angle. If you are at around 2500ft at REEBO and use VNAV to ZOLPA (set to around 20ft), it will bring you all the way down to the runway. It's helpful, because a lot of times with live weather, you can't see the runway until you're really close because of a coastal marine layer and fog and it's easy to overfly the runway.

  • @JamunaJivanadas
    @JamunaJivanadas Месяц назад

    The roof of the parking garage is an awesome spot to watch the planes land.

  • @peterb6382
    @peterb6382 Месяц назад

    That’s not an Extra 300, it’s an Edge 540

  • @larrymeyer6006
    @larrymeyer6006 Месяц назад

    Did it years ago in a B727 and before GPS aid. Piece of cake.

    • @EricaCalman
      @EricaCalman Месяц назад

      What was the visibility/ceiling?

  • @kg40025
    @kg40025 Месяц назад

    Not hard to fly at all.

  • @byronjaffe518
    @byronjaffe518 Месяц назад

    Not really that more difficult then any airport

    • @EricaCalman
      @EricaCalman Месяц назад

      In good weather it’s a minor challenge due to the 3.5 degree glide slope, in bad weather it gets hard, although as GPS has gotten better it’s become easier. Stuff comes up though, like right now the RNAV Z is unavailable due to construction.

  • @cecilegillin1614
    @cecilegillin1614 Месяц назад

    very helpful!

  • @stevebalt5234
    @stevebalt5234 Месяц назад

    What software is this?

    • @EricaCalman
      @EricaCalman Месяц назад

      @@stevebalt5234 flightgear www.flightgear.org/ which is free and open source

  • @peterferguson-mccardle1959
    @peterferguson-mccardle1959 Месяц назад

    Whilst Americans sometimes have the most annoying, boring voices, (certainly in this case) it must be said that the quality of the graphics on this are dire! But notwithstanding all of that, who would have allowed a city to expand right on the glide slope of an airport? Absolutely ridiculous!

  • @davidrutherford9633
    @davidrutherford9633 Месяц назад

    Just remember the hood folks in San Diego continue to vote down all new airport at San in their elections. And it was the San Diego city government that allowed the building in the runway path to be built in the first place.

    • @EricaCalman
      @EricaCalman Месяц назад

      Bruh they approved it in 1928 when San Diego was tiny, and there aren’t many votes on relocating cause where are you gonna put it?

    • @Niteowlette
      @Niteowlette Месяц назад

      ​@@EricaCalmanexactly! Downtown San Diego has been there since the Spaniards landed, lol! Same with Burbank airport. The airport was there when nothing but orchards and farms surrounded the area.

    • @dashriprock4308
      @dashriprock4308 4 дня назад

      A great disservice. Too bad San Diego cannot use Miramar instead, but...coastal defense.

  • @davidrutherford9633
    @davidrutherford9633 Месяц назад

    How do you know that the Airbus is better than the 747. You sound like you are on the anti Boeing bandwagon and talking stuff you do not really know except from the other you'tube experts

    • @EricaCalman
      @EricaCalman Месяц назад

      Not at all, I think the 777 and 787 are leagues above the a330 and a350, and the 738-700/800/900 are thoroughly decent airplanes they just aren’t AS good as the A320 neo, and of course everybody knows why the max is trash.

  • @WWPlaysHoldem
    @WWPlaysHoldem Месяц назад

    Fly a 3 degree glide slope and the plane doesn’t care what is below it.

    • @stevebalt5234
      @stevebalt5234 Месяц назад

      Well said

    • @EricaCalman
      @EricaCalman Месяц назад

      Well (a) it’s 3.5 degrees (b) technically it does care even aerodynamically because of the ground effect and (c) the occupants care which is why the GPWS exists

    • @dashriprock4308
      @dashriprock4308 4 дня назад

      @@EricaCalman The first time that I flew in there as a passenger was an eye-opener. Kind of frightening. Watching a DC-10 land there at night from the freeway (south) was exciting. It came from JFK. I saw a 787 Dreamliner (BAW) en route to SAN from LHR on Flight Radar 24 the other morning.

  • @mackie490
    @mackie490 Месяц назад

    I found your video searching for Contrapoint's Violence video (I watched it and followed it with Voting). It is still the least viewed. People don't like thinking too hard about why they like violence, or thinking that it could make them immoral. To me it is similar to people who don't listen to song lyrics. They just don't think about it, and they don't really want to. You bringing up violence without consequences in film is a good point. Unless death is shown on screen, or characters react to the implied death, then usually it is understood that death didn't occur, even if characters were shot, drowned, sent flying a mile into the distance, had a piano fall on them, etc. Even then, they may come back as a twist. Sometimes I think that individuals relishing acts of violence is the only way to motivate the masses, that maybe violence for the greater good and no other benefit is not motivating enough. I have mixed feelings about that belief. I really like these lines: "When there's actually time and political capital available to do something, people seem to lose interest." "It's wrong to harm, but it's right to protect."

  • @mackie490
    @mackie490 Месяц назад

    19:08 This line hit hard.

  • @Simulera
    @Simulera Месяц назад

    Good video. Plus, flexible condensed matter physicists can be very useful on many kinds of projects and in various sorts of teams that are, very strictly speaking, not condensed matter. PhD CMP folks that are a bit of polymaths are working in and leading work in many areas of science and applied science. Very good foundations background in or out of academia per se as well. There are institutes, national labs, technical and scientific research-heavy companies and lots of things to do, as well as the path to university faculties.

  • @meek6173
    @meek6173 Месяц назад

    Hi Erica! This was an amazing video-- currently an incoming sophomore physics major at Berkeley and still am SUPER unsure as to what subfield of physics most interests me. While I've been told I have a lot of time to figure it out, I still want to get involved undergrad research soon. I've always been partial towards high energy theory especially just due to the "hype" around particle physics, but at this point, I can't say for sure what I want to do, however, this video did make condensed matter seem rather interesting as well. Do you have any insight on what factors made you decide to go into condensed matter over astrophysics? Thank you :)

    • @EricaCalman
      @EricaCalman Месяц назад

      Astro vs condensed matter is complicated, and the obvious answer is "it depends on what interests you" but it also depends on what style of work you prefer. Deciding theory or experiment is a bigger decision but also one you usually make earlier on, although as a 2nd year undergrad you do still have plenty of time. I'd imagine if you've picked theory you're more drawn towards it already but you should try some undergraduate research and probably start at least a math minor if not double major. For me the big advantages of condensed matter are that you can both make much faster progress instead of waiting 50 years like with the Higgs mechanism and you can work on the actual experiments yourself instead of just requesting data from large facilities like the LHC for particle or one of the handful of truly capable observatories for astro. For theory the second part is less of a big deal because you're not collecting your own data anyways but you have a much better chance of getting data relevant to the theory you're working on rather than whatever is trending that year. Also you might already know this but definitely try some computational theory because there are pure pencil and paper theorists but even they have to run some numerical simulations and there's even more theorists who specialize in simulations.

  • @MickLeonardJD
    @MickLeonardJD Месяц назад

    OMG this was awesome. Thanks.

  • @Tiara48z
    @Tiara48z Месяц назад

    What’s the point of the zero-th law? If you separate the room in two parts and then remove the separator you really haven’t changed much. Right?

    • @EricaCalman
      @EricaCalman Месяц назад

      The point of the zeroth law is that if you remove the separator you shouldn't change anything but that isn't just a given and doesn't follow as conclusion from any other assumptions and has to be stated explicitly. It does (mostly) follow from the assumption of ergodicity of spacetime but not any of the other three laws.

  • @dtopolski1
    @dtopolski1 Месяц назад

    Never mind the hill sir! There is an Alaska 737-900 on the blast pad!!! LOL!!!

    • @EricaCalman
      @EricaCalman Месяц назад

      Oh yeah lol, it's actually fine for them to line up before the displaced threshold but I was a little low and flying a larger airplane so it was a little too close for comfort, good thing its a simulator with no airplane-airplane collision physics XD

    • @jbrown3547
      @jbrown3547 21 день назад

      @@EricaCalman It is not fine for them to line up before the threshold.

    • @solefinder3708
      @solefinder3708 19 дней назад

      @@jbrown3547 Yep, that pilot was Mr Smith, from the Matrix, trying to take over that program.

  • @normaninsandiego7061
    @normaninsandiego7061 Месяц назад

    Welcome to San Diego

  • @nocap4715
    @nocap4715 Месяц назад

    Comment your gender please

  • @nocap4715
    @nocap4715 Месяц назад

    Gay😮

  • @timothypropst238
    @timothypropst238 Месяц назад

    Landed many times at SAN in Airbus and didn’t find it that challenging. The challenging part was getting stable prior to 1000’ AGL especially with a 3.3° glidepath.

    • @EricaCalman
      @EricaCalman Месяц назад

      @@timothypropst238 When the weather is good (which it usually is) it’s a little harder than average but not that bad. When it gets hard is when the ceilings get low which they often do because of our marine layer. The DA for the RNAV-Z is 621 ft and the MDA for all the other approaches is 680, and the most overcast is usually about 1500 but sometimes it dips much lower and between that and the traffic volume going to a single runway is when it gets difficult. There is an LPV for the RNAV-Z that goes down to 262 but that’s a little risky, although it is usually possible to use it to get down if necessary.

  • @EricaCalman
    @EricaCalman Месяц назад

    TLDW The most visually spectacular part of the approach is the downtown buildings just to the left of the approach to runway 27, but the difficulty comes from a combination of the hills to the east and the fact that we frequently have low ceilings due to coastal marine layer overcast. The glide slope is 3.5 degrees which is a bit difficult unto itself, and most of the approaches are non precision but there is a precision RNAV GPS approach but the DA for that approach is 617 ft and the MDA for the non precision approaches is 670 ft. When things get hard is when there's lots of traffic, only one runway, low ceilings and no ILS due to the terrain, and the buildings plus the terrain necessitate those high MDA/DAs so it can get pretty difficulty on a bad day. That being said most of the time we have beautiful weather and the approach is still a little hard due to the buildings and the steeper than average glide slope it's also really beautiful.

    • @EricaCalman
      @EricaCalman Месяц назад

      Also I flew the RNAV-Z down to the LNAV/VNAV minimums even though most airliners have LPV capable GPS but imo flying down to 200 ft over those hills is a little risky.

  • @gerardshaw1549
    @gerardshaw1549 2 месяца назад

    Great video

  • @spurproductions9518
    @spurproductions9518 2 месяца назад

    thats an outside tumble

  • @ocularpressure4558
    @ocularpressure4558 2 месяца назад

    I’ve lived here in San Diego California for 38years and I have only ever been to the air show once 🥲

    • @EricaCalman
      @EricaCalman 2 месяца назад

      You can go this year! It's free unless you want to sit in the bleachers (which are usually too hot imo). Parking is a bit of a headache but it's not that bad and super worth it!

    • @ocularpressure4558
      @ocularpressure4558 2 месяца назад

      @@EricaCalman awesome I’d really love to take my wife. Her dad died of cancer two years ago and he used to sit at the airport when he was a kid and just watch the planes fly. My wife loves airplanes because of her dad and I think that would be a great idea. Thank you for telling me about the airshow. I think I’m gonna have to surprise my wife with tickets and get us a good seat. Thanks again.💪👍

  • @EricaCalman
    @EricaCalman 2 месяца назад

    This was mostly a practice talk but since people have been watching it I want to emphasize that the main purpose of using Van der Waals structures is that it increases the binding energy so that indirect excitons are stable at room temperature. Both binding energy and the temperature at which spontaneous coherence is expected happen are both driven by the exciton bohr radius which is much smaller for TMD Van der Waals quantum wells than conventional quantum wells.I do talk about it but I don't mention it explicitly in the first few minutes or when I talk about the limits of conventional quantum well structures.

  • @RyanKingArt
    @RyanKingArt 2 месяца назад

    very cool!

  • @briancrawford69
    @briancrawford69 2 месяца назад

    Generations of American air power. Both also some of the best looking planes ever made

  • @SuperUAP
    @SuperUAP 2 месяца назад

    That's neat and all, but let's see how they operate with incoming missiles and flack.

    • @EricaCalman
      @EricaCalman 2 месяца назад

      @@SuperUAP lol demonstration team formations aren’t exactly tactical

  • @EricaCalman
    @EricaCalman 2 месяца назад

    So in case anybody is confused or knows better the W that we usually says is “micro states per macro state” actually does not count permutations of identical particles, so the analogy of ordering of cards is necessarily a loose one since the factor is more akin to combinations that permutations, but for a highly diffuse system like an ideal gas they are approximately the same anyways.

  • @askd.question2153
    @askd.question2153 2 месяца назад

    the most gay video i ever watched and i like ^^

  • @AkukAkuku
    @AkukAkuku 2 месяца назад

    Great video. It reminded me of that ultrapink pigment that you can't truly show on a computer screen due to the problems you mentioned.

    • @EricaCalman
      @EricaCalman 2 месяца назад

      Thanks! Yeah I thought about those when mentioning bright pigments and was going to ask include a brief discussion of why magenta printer ink/toner isn’t as vibrant (besides just cost) but I cut it for time.