New videos from Dr. Dave and Bob Jewett

dr_dave said:
Thanks. It did take a long time. Bob and I spent an entire day on the raw video for the quiz, and I spent about 20 hours editing the video and creating the documents. Bob also put up with lots of calls and e-mails from me double checking things with him before posting the results. But we both think the time was well spent, if people put the videos to good use.

I think the instructional videos will be even more useful. I hope to finish those within a couple of weeks.

Regards,
Dave
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I think I can safely speak for the entire forum when I say, "Hurry up!" :)
 
I am embarassed.

I got 13 wrong. I never would have guessed I could be wrong about so many calls.

You and Bob have done a valuable service to the pool community.

#29. I call BS. You can't tell that the cue ball scratched from the video except for the noise and even then, that sound could be from a ball falling into another pocket on another table or something else. You guys are just plain mean.

#95. You are so wrong. I'm sorry. Bob's cue stick was planted at the very base of the CB and it looked like an intentional scoop from the very beginning. I know Bob can play a little and it would take an APA 3 for me to call that an unintentional scoop.

I learned a lot from my mistakes & it was an eye opener for me. :angel2:

The push shots were a problem for me as well as the CB and OB frozen to the rail shots. A couple of tangent line errors for me too but with your quiz answers I am very much improved. I wonder how many referees will be honest enough to own up to their number of mistakes. But that really doesn't matter. The closet liars, the quiz cheaters and the honest Joe's will improve their calls and that's the bottom line. :D

You two make a great team. Thanks!

JoeyA
 
JoeyA said:
I got 13 wrong. I never would have guessed I could be wrong about so many calls.

You and Bob have done a valuable service to the pool community.
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Thanks Joey. That means a lot to me.

JoeyA said:
#29. I call BS. You can't tell that the cue ball scratched from the video except for the noise and even then, that sound could be from a ball falling into another pocket on another table or something else. You guys are just plain mean.
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We didn't plan this, but it is kind of fun (:sorry::p:D). Actually, if you look at the answer sheet, this shot is marked "TOUGH CALL," and the instructions permit you to be lenient with shots marked this way (i.e., you don't need to count this one wrong).

JoeyA said:
#95. You are so wrong. I'm sorry. Bob's cue stick was planted at the very base of the CB and it looked like an intentional scoop from the very beginning. I know Bob can play a little and it would take an APA 3 for me to call that an unintentional scoop.
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You are correct ... we did create the scoop intentionally. However, don't you think an intentional scoop or intentional miscue (with or without an "unsportsmanlike conduct" designation) should be called only if it is obvious the player had a useful or devious intent. With this shot (shot 95), nothing is to be gained by scooping; in fact, the scooping can only hurt you. We meant for the scoop to seem accidental. I guess Bob is too good to pull this off. I probably should have shot this one instead. :o What do you and others think? Would you really call a foul on this shot for certain players?

JoeyA said:
I learned a lot from my mistakes & it was an eye opener for me. :angel2:

The push shots were a problem for me as well as the CB and OB frozen to the rail shots. A couple of tangent line errors for me too but with your quiz answers I am very much improved. I wonder how many referees will be honest enough to own up to their number of mistakes. But that really doesn't matter. The closet liars, the quiz cheaters and the honest Joe's will improve their calls and that's the bottom line. :D

You two make a great team. Thanks!
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Thanks again Joey. I'm glad you and others like the videos.

Regards,
Dave
 
thanks for all the work to puting up this test. It must have taken alot of work.

Anyway:

i've been playing pool for 3-4years now, and I scored 76/100.

(dont have time yet to check out why i was wrong as i'm at work at the moment).
 
Klopek said:
Dr. Dave,

In "HSV B.47 - effect of shaft endmass and squirt on miscue limit", (in the final test), couldn't the increased squirt be directly related to the greater english applied?.
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I'm curious why a solid maple shaft wasn't used, the clothes pins seems like it would be inaccurate in the results.

I don't know if others have this but two of the videos start at shot 70. Makes it hard to know how to score yourself.
 
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Craig Fales said:
I'm curious why a solid maple shaft wasn't used, the clothes pins seems like it would be inaccurate in the results.
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The difference in squirt angle and miscue limit is very small when comparing a low-squirt cue to a regular (non-low-squirt) cue. We added the clothes pins to exaggerate the effect to see if there is an effect ... there is. The difference in squirt between a low-squirt and non-low-squirt cue is large and noticeable (especially for long, firm shots), but the difference in the miscue limit is probably difficult to detect when comparing "normal" cues.

Craig Fales said:
I don't know if others have this but two of the videos start at shot 70. Makes it hard to know how to score yourself.
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I'm not sure what you mean by this. Could you be more specific? There is a quiz video that starts at shot 70, and there is an answers video that starts at shot 70 ... is that what you mean? BTW, the easiest way to score yourself is to use the answer summary sheet.

Regards,
Dave
 
Neil said:
When the videos start, it says shot #70. But as soon as the shot is shown, it gives the correct # for the shot.
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Could you reply with a link to the specific video so I will know which one you're talking about? I haven't seen this.

Now, with YouTube videos, a still image appears on the screen before you play a video. This still image can be from the middle of the video. But when you hit the play button, the video starts at the beginning. Is this what you are talking about?

Thanks,
Dave
 
dr_dave said:
FYI, Bob Jewett and I filmed a bunch on stuff together a couple of weeks ago, and I finally got everything edited and posted. The first stuff we shot dealt with some pool physics topics:

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I know the quiz stuff is probably more useful and fun, but I thought some people would also have some comments and/or questions and/or debate for some of the other clips also, especially:
and

I know some people have often had heated debates in the past about the appropriate type of spin for squatting the CB. I think the answer is fairly clear now. Also, wasn't there a debate about spin transfer lately? ;) Here's more evidence.

Regards,
Dave
 
I scored an 88, which I'm fairly proud of since I've had no formal referee training... tough test, you guys. :thumbup:
 
cigardave said:
I scored an 88, which I'm fairly proud of since I've had no formal referee training... tough test, you guys. :thumbup:
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Yo CD,
I scored one less than you.

Do you want to give me one shot on the wire in a race to a hundred for some reasonable prize money, say my 500 to your 750?

We can livestream it here in Stavanger, Norway because I want to be fair with all you Americans. :cool:

Roy D'Fish
 
JoeyA said:
Yo CD,
I scored one less than you.

Do you want to give me one shot on the wire in a race to a hundred for some reasonable prize money, say my 500 to your 750?

We can livestream it here in Stavanger, Norway because I want to be fair with all you Americans. :cool:

Roy D'Fish
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I'm confused... Roy, are you posting from Joey's account?... or Joey, are you C&P-ing a response from Roy in a response to my post. :confused:
 
76 and a couple of them where do to bad instructions from past tournament directors on legal push shots and of course confusion from APA push rules being different. Not to bad having never read the rules outlined for the quiz. Great video, now if we could make it mandatory viewing for all tournament directors and league operators.
 
dr_dave said:

The difference in squirt angle and miscue limit is very small when comparing a low-squirt cue to a regular (non-low-squirt) cue. We added the clothes pins to exaggerate the effect to see if there is an effect ... there is. The difference in squirt between a low-squirt and non-low-squirt cue is large and noticeable (especially for long, firm shots), but the difference in the miscue limit is probably difficult to detect when comparing "normal" cues.

I'm not sure what you mean by this. Could you be more specific? There is a quiz video that starts at shot 70, and there is an answers video that starts at shot 70 ... is that what you mean? BTW, the easiest way to score yourself is to use the answer summary sheet.

Regards,
Dave
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There is a video that starts at 1 ~ 30, then the second starts at 70.
 
I scored 90, but I think I had 5 wrong because I was going off the rule that when a ball was frozen to a rail you had to drive a ball to another rail. When did that rule change? (Ive been away from pool for a couple years)
 
Another excellent effort in sharing information. Thanks to you and Bob Jewett for putting together the videos.
I'm sure I speak for many by saying that I'm very appreciative of the hard work and dedication to the game from both of you.

For your info, my score was only 79%
 
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