Search results for query: *

When I talked about a "problem" not requiring OOD/OOP, my point was only to have you understand that all coding problems are potentially OOD/OOP. By all means, practice OOP. For example, if you have partitioned you problem into objects and you notice that you're using a lot of pointers to one...

In line with what @Vanadium 50 said, 50 hours is not enough for anything that could be described as "mastery". If you are looking for a regular job as a software engineer, expect to work with more experienced SW engineers for at least a year. The normal trajectory for someone who leaves...

I was refering to Elon Musk.

That's a very worrisome statement. You are touting not "sounding like an ignoramus" as a major college objective - worthy of a very substantial portion of a college curriculum. I am currently working on a medical device. I would gladly "sound like an ignoramus" several times a day if that would...

I have spoken to many, many people who were considering entering college for a degree. I always ask what they are looking for. So far, the oft-vaunted "rounded education" has never been mentioned - it scores a perfect zero. In my first post to this thread, I picked on "19th Century...

To address the OP Title question "Are too many students going into Computer Science?": The first problem with the question is that there are a lot of possible objectives in seeking a "CompSci" degree. Presuming they are seeking post-grad employment, the student may aspire to Software Engineer...

My only concern is that those students get what they are looking for - Computer Technology jobs. I had a college buddy, Burt Solomon, who was a fine computer programmer but was hesitant to get a job as a programmer. His mother told him that pretty soon, all of the computer programs would be...

Okay. I'm guessing it's only a moment in time after you cross the event horizon. Before that, one could say it's at the center of the event horizon, but I'm not sure how meaningful that would be. I am still able to exchange information with some of these friends. For objects that are...

With the help of friends, I will recast my description below and get rid of "above" and "below". When I recast my description, I will still be using "distances". But I think that is fair. After all, I am supposedly closing in on the singularity (getting "closer"). I am actually depending on...

The Bekenstein Bound places a upper limit on the amount of entropy that a given volume of space may contain. This limit was described by Jacob Bekenstein who tied it quite closely to the Black Hole Event Horizon. Put simply, black holes hold the maximum entropy allowed for their volume. If you...

As a matter of practicality, unless it is known to be happening, it is not considered anything. But in my scenario, it was the chlorine atom that was "carcinogenic", but not yet cancer - since it was what was damaging the DNA.

Doctors and radiologists are very mindful of the expense and health risks of PET and xray scans. So if he's been to radiology 5 times, I am sure it was for very solid reasons that are well worth that expense and risk. I also think that its useful to compare those risks to situations where...

Yes. I think you basically have it. Part of the problem is that you are trying to pull more information than science has collected. It took decades before science was able to describe a direct chemical path from tobacco smoking and lung cancer. No one has ever directly observed the entire...

Just to be clear, we are talking about the long term effects of exposure to ionizing radiation. We are talking about exposure to medical procedures and typical environmental exposure. We are not talking about the kind of intense "acute" exposure that will prompt radiation poisoning and death...

Let's do one type of radiation at a time: x-ray, CT, mammogram: These are all x-rays. The staff will follow practices to keep themselves shielded. They may commonly use lead-lined aprons and will often operate the xray device from another room or around the corner from the device. They need...

Here's a good assessment (youtube) of where SpaceX likely stands for its next attempt. Elon may say 1 or 2 months, this assessment is more like 3 months to a year.

Here's the advice from the CISA (Cybersecurity and Infrastructure Security Agency). CISA is part of the US Department of Homeland Security. If a magnetic drive contains US National Security Information, it requires physical destruction of the magnetic platters before disposal.

You are referring to Shaw's Algorithm. Shaw's Algorithm does factorization, and if you wish to skip the details it is OK to say that it "reverses multiplication". But if you do go into the details (as provided in the wiki link above), you will discover that there is no actual "reverse...

The methalox combustion resulted in a zone just below the engines where the "flames" were entirely transparent. Before Starship cleared the tower, the length of this zone was as little as dozens of feet. But once it got going, it provided a completely unobstructed view of the white-hot...

Reverse Polish Notation, abbreviated RPN is, Yoda has mastered. RPN semantics, Forth coding language has, Yoda favors.

What happens when you leave your car parked in the launch evacuation zone: https://gizmodo.com/spacex-starship-launch-pad-damage-video-1850357836

Except for an area 4nm in diameter around Starbase itself, there are no active Temporary Flight Restriction areas.

If you were watching the SpaceX feed, "everyone" was that crowd of SpaceX employees in the flight control building. The SpaceX objective was to clear the tower (rebuilding it would take months) and collect enough data for the next try. They have additional rockets built and close to ready...

No stage 2 separation - The whole thing is tumbling - RUD.

Five engines appear to be out. Now six Stage 1 engines are out.

SpaceX Starship Launch at 8:33am CDT (local time) - cleared the pad and still going.

Currently, the FA has TFRs registered for Starbase for Thursday (tomorrow) through Tuesday the 25th. That include Saturday and Sunday.

One tiny step at a time... Are you passed the the "Hello World" stage? If so, keep going. Try out one tiny thing at a time and don't give up until you not only get that small thing to work, but you know why it works and have demonstrated at least a few working examples. Only then move onto...

The FAA has Temporary Flight Restrictions posted for Starbase (Brownsville, TX) for 4/20 and 4/21.

First stage pressurization issue will nix a launch for today. But they are continuing for reheasal. Countdown clock will stop at T-00:03:00.

SpaceX is also providing a link with narration. T-00:12:00

SpaceX has now reserved airspace for possible launches on Monday through Friday of this coming week.

There is now an identical SpaceX TFR for Tuesday.

This explosion was on March 29. You can see flames cooking the frame as the video starts - well before the explosion.

TFR for SpaceX "Space Operations" For Monday, April 17, 2023 1200-1505UTC (8:00-11:05am local time) Issue Date : April 14, 2023 at 1044 UTC Location : Brownsville, Texas Beginning Date and Time : April 17, 2023 at 1200 UTC Ending Date and Time : April 17, 2023 at 1505 UTC Reason for...

Before a Starship launch, we should see a TFR (Temporary Flight Restriction) issued by the FAA. It should be issued about a full day before the airspace over Starbase is put under control - so more than a day before a launch. The FAA TFR's are posted at https://tfr.faa.gov/tfr2/list.jsp. If...

The SNO+ Experiment in Canada is still in development, but analysis of early antineutrino detections as published in Physics Review Letters and as referenced in the SNO+ results page are believed to be from appear to be the from Ontario reactors 240Km away.

A collaborative effort is yielding a Dark Matter picture of the universe from microwave (CMB) data collected by the Atacama Cosmology Telescope. Major sections of the sky have already been imaged. Those are shown in the image below as the red/blue speckled regions (from a University of Toronto...

I'm posting this in "Quantum Physics" although it is just as much "General Relativity". A paper entitled "Quantum gravitational corrections to particle creation by black holes" was published in Science Direct earlier this month. It appears to provide an event horizon mechanism for holding...

This is Bizarre: As described in many news articles including this one, Kazakstan has grounded Roscosmos until Russia pays up $30M in Baikonur Cosmodrome related debt. Perhaps we need to start a Roscosmos Go-Fund-Me site. More seriously, I notice that this Cosmodrome is not listed among...

The issue described in that article was primarily lift, not drag. From the article cited by @DaveC426913 . Here's what that article says: You don't want your tail flying - you want traction. But it also includes drag information. I can't access the pdf, but I can access the graphics. This...

Entanglements not withstanding, the CNOT does not change the control qubit. They will invert the state of the target qubit for conditions where the control bit is "high" or "up" or "1" (your choice of the symbol set). The reason I say "entanglements not withstanding", is that entangled qubits...

Because gold is very malleable, gold leaf may be less expensive than you expect: Booklet of 25 3.4" squares for $57

A tile shape has been identified that can tile a surface aperiodically. Phys Org article

I corrected my post. You are right - apparently the Zhuque-2 second stage did ignite - but the 2nd stage vernier engines failed.

After the second stage got up there, they tried to ignite the methane/oxygen mixture. You could see the ignition sparks, but no flame. Like someone trying to get a cigarette lighter to light. It's unclear whether there was actually a methane oxygen mixture to ignite.

Relativity Space had to delay the launch first for high winds, then for a boat crossing through the range. It's launching from Cape Canaveral and it's launch window was 10pm to 1am. It finally launched at 11:25pm. Nice vivid blue flame. Clearly, they have attempted to ignite the second stage...

Terran will try again tonite as early as 10pm - just over 2 hours from now. space.com - Relativity Space

The "psf" is pounds per square foot. If you put 1 pound on a square inch surface, the pressure will be 144 psf. So the "pounds" value can readily be less than the "pounds per square foot" value. If I had a 1-gallon contained that was 7 miles deep, the pressure at the bottom would be the same...

Okay. We'll be getting the sun back later today. A bit of a warning though. While in the custody of the Southern Hemisphere, the sun was allowed to grow some kind of Mohawk.