General Questions Thread

[risingstar3110]

Originally Posted by Cats

You mean resonance?

I actually needs something which is similar to an equipment guideline. But yeah, still thank you a lots since resonance did give me a good start today.


Any more helps (on vibration measurer or accelerometer) will be appreciated........

[Vexx]

Originally Posted by Cats

Whats the difference between "Download Help" + "Playback Help" forums compared to the "Tech Support" forum?

Well.... supposedly Tech Support is for general issues outside the collecting and feeding of anime fansubs.

But yeah, there's a lot of slosh-over.

[Aoie_Emesai]

Here's a quick physics question. Assuming we have an average house hold water heater and a coil stove. Would it be more energy efficient?

1. Using the sink to turn from cold to hot

or


2. Using cold water/room temp and using the stove to boil it?

[Vexx]

Hot water from the sink (from the hot water heater) isn't a Good Idea if you're going to drink it or use it in food.

The hot water tank is a clusterf*** of minerals and metals - only to be used in an emergency situations for drinking.

That said.... a hot water heater is, by definition, less efficient because it uses energy 24/7 to sustain a certain water temperature and usually has two 4500W heating coils. Heating it on the stove using a 750W/1000W coil for the 5 minutes or so is much less costly.

The tankless water heater systems (instant heat) that use gas or electricity are also much more efficient and don't have the 'heavy metals' issue.

[0utf0xZer0]

Originally Posted by Vexx

Hot water from the sink (from the hot water heater) isn't a Good Idea if you're going to drink it or use it in food.

The hot water tank is a clusterf*** of minerals and metals - only to be used in an emergency situations for drinking.

Great, so in other words I've been slowly killing myself by trying to speed up the time it takes to make tan-tan noodle soup.

(Well, imitation tan tan noodle soup at least. I don't have the actual ingrediants so I just cook instant noodles in a broth made from peanut butter, soy sauce, shrimp stock, and hot chili oil. And before you ask, the peanut butter dissolves when the water boils so its nowhere near as disgusting as it sounds, at least if you get the ingredient ratios and cooking time right.)

[Vexx]

Heh... interesting use of peanut butter, which I'd say you're using as kind of a tahini or miso paste substitute.

But yeah.... hot water heater output is really not for drinking in most cases outside of emergencies. There *are* marvelous water heaters that are suitable .... but they're "green", use special tank materials, and cost a small fortune.

[SirJeannot]

Originally Posted by risingstar3110

PS: The only things which i got so far is general information on Laser Doppler Vibrometer and Accelerometer (especiallt Piezotronic one). Both could be found in wikipedia or other encyclopedia through

you want to have a piezoelectric accelerometer, as a laser interferometer may be too precise for your need.
with just the acceleration over time you can work out movements as after a vibration, your structure should (as these are vibrations) naturally go back to it's "still state".
beware, most high precision accelerometers are sensible in only one direction. if you want x/y/z, you'll have to use 3.
other point that may affect the measurments : the accelerometer shoud and must attached so that there is no dampening medium between your structure and the accelerometers. these usually can be screwed

[Cipher]

Do we have to sleep specifically at night? Why? What if we have the opposite average sleeping routine? Sleep=day, wake=night.

Was there anyone who couldn't sleep at all and lived through the rest of hir life w/o sleep?

Thank you.

[felix]

On average I'd say at most you can stay up 1 day and a half maybe 2 tops, at which point you will really want to sleep and not care for whatever it was that kept you up. This goes with out saying your coordination and other skills will be severely punished by that point. Anyway, at the end of that sleepless period you will sleep a lot to recover and possibly get a little sick for a while after depending on how much you pushed it. You don't have to sleep specifically at night but generally if you sleep in the day you'll take 8 to 10 hours to get a good rest while at night its around 5 to 7 (this heavily depends on age but that's the average I guess). Besides the obvious advantage in time you also can not meet schedules, appointments and daily routines if you sleep in the day; unless you have some special work that requires you to be at night -- which you don't!

In short: we sleep at night because its the best time to sleep, most convenient time to sleep and by sleeping we get to be in tip top shape each day which saves us more time and gets more work done then not sleeping and being incompetent walking zombies with the IQ and concentration ability of a domesticated animal.

Also, you can not live with out sleeping, your body will fail, by which you should understand you will "sleep" if you want to or not. For more information just refer to wikipedia.

[Zu Ra]

Originally Posted by Cipher

Was there anyone who couldn't sleep at all and lived through the rest of hir life w/o sleep?

Nope there isn't any recorded . The sleepless records so far (source)


- 201 Hours (08.4 days) : Peter Tripp

- 260 Hours (11 days) : Randy Gardner

- 276 hours (11.5 days) : Toimi Soini

- 449 hours (18.7 days) : Maureen Weston


Maureen Weston began to hallucinate towards the end but reported no lasting effects from her rocking chair marathon .

EDIT

Originally Posted by Cats

I'll take it since these are record attempts these people were likely doing something like meditation in that time, for obvious reasons -- so more or less half-sleeping.

Mostly scientific research

Peter Tripp : He spent most of the time in a glass booth in Times Square, and the rest in a hotel room across the street, set up as a laboratory to monitor his reactions.

Randy Gardner : Stayed awake for 264 without using any stimulants. His stunt was part of a school science project on sleep patterns.


Nothing is known about Toimi Soini . But Maureen Weston like you said meditating or trance like state on a rocking chair .

[felix]

I'll take it since these are record attempts these people were likely doing something like meditation in that time, for obvious reasons -- so more or less half-sleeping.

[Cipher]

Perhaps I need to rephrase my question: What would I, health-wise, lose by sleeping at day and awake at night? Does it have something to do with the sun?

[felix]

No. I sleep plenty in the day on some occasions and substantially less at night depending on circumstance; however like I said earlier because of our little bioclock and also the transition from night to day, you will require a lot more sleep so you lose time.

[risingstar3110]

@SirJeannot: thank there =]

Originally Posted by Cipher

Perhaps I need to rephrase my question: What would I, health-wise, lose by sleeping at day and awake at night? Does it have something to do with the sun?

This comes from only one source (so you may want to check it again), but yes it does affect your health by some degrees and does have something to do with the sun (due to both the temperature and the sunlight).

Your body temperature when you are sleeping is lower than when you are awake (by up to 3 degrees Celsius, i think). Therefore you easily get a deep sleep (and recover your energy faster) when it's not too hot, and are harder to awake when it's not sunny outside.
To the extreme, image it's like try to cook something in the snow or freeze something under the sunshine, it's not as effective.

Then by exposing your eyes to the sunlight, you will be more awake and feel less tired while working (i have a really good article about why but i don't have it here, so...wikipedia...again @_@). Therefore it's recommended to use that replicating sunlight lamps (unless you are a vampire of course )

[Anh_Minh]

Originally Posted by Cipher

Perhaps I need to rephrase my question: What would I, health-wise, lose by sleeping at day and awake at night? Does it have something to do with the sun?

Vitamin D deficiency.

[TinyRedLeaf]

You've probably felt it before, at least once in your life: that prickly, electrical sensation running down the back of your neck, a tiny signal that someone is behind you.

So, I'm wondering if anyone had come across studies on this form of perception?

Anyone who's watched enough wuxia or chambara shows will no doubt recall classic references to 殺气, (sha qi, or saki), commonly translated as "bloodlust"; it usually comes up in scenes where the hero(es) senses life-threatening danger nearby.

I'm curious whether such sensations are related.

[Woopzilla]

That reminds me of City Hunter and Angel Heart. They seem to have senses that warn them whenever a gun is aimed at them.

Perhaps the feeling of someone being behind you is just picking up small sounds subconsciously without focusing on them? Maybe body heat? Could possibly be a natural instinct/ability to keep ourselves alive?

I don't think there's ever been any scientific proof of this though... or at least I can't find anything.

[Vexx]

There's an idea that subtle changes in air currents are detectable by the "small rodent" parts of our brain (as well as the 'microsound' detection). So the presence of a body or its breathing is enough to jiggle the air around you which your body hairs and skin would notice. But no, I've not seen any research on the phenomenon. And yeah... I've had the experience myself. Even the cat can't hide from me.

[Zu Ra]

EDIT : I am not talking about Presence or Feeling One's Presence but pure Blood Lust .



Blood-lust has more to do with fiction when considering humans . The word has its association/origins with animals . Yeah when we do get angry, we give out hormones . But the human nose is incapable of identifying such smells . Animals on the other hand, can sense such smells and use these very smells/odors to intimidate .

So what I am trying to says is humans cant feel blood-lust . We can see it, but visuals conception has nothing to do with actual intent (murder) . Appearances are deceptive ... here is a picture of a famous murderer ....

Spoiler:

Charles Manson

[Kyuusai]

Originally Posted by TinyRedLeaf

You've probably felt it before, at least once in your life: that prickly, electrical sensation running down the back of your neck, a tiny signal that someone is behind you.

So, I'm wondering if anyone had come across studies on this form of perception?

Anyone who's watched enough wuxia or chambara shows will no doubt recall classic references to 殺气, (sha qi, or saki), commonly translated as "bloodlust"; it usually comes up in scenes where the hero(es) senses life-threatening danger nearby.

I'm curious whether such sensations are related.

I've occasionally gone on research binges trying to find reputable studies on issues such as this, and I've always come back empty-handed.

A century ago, when so much more of the world's body of scientific study consisted of "taking shots in the dark", research like this wasn't as uncommon, but it didn't tend to get anywhere, either. Today, when there are other things to study that we understand much better, there just isn't as much room for reputable research into phenomenon where we don't even know what we're looking for or how to consistently evoke it, much less how we'd observe it. Add to that the wide body of frauds, pseudo-scientists, and pseudo-spiritualists who have so much public mindshare and I can see how real researchers are put off of it. (Especially those with the "If I can't explain it, it doesn't exist" mindset. It's a very bad mindset for a scientist to have, but ego often prevails.)

The closest I've seen to research that might begin to touch on the issue are some studies about the body's electromagnetic field.
Harold Saxton Burr was a professor of anatomy at Yale who, along with his successor, made some very curious observations in this area... but he went on to make some conclusions that were real stretches of logic. He believed that certain things could be observed by changes in the field and went further in believing that the body could actually be effected by changes to the field. If he was right on any of those points, well, it's presently lost thanks to his overeagerness overcoming his better sense.
Burr's research had some resemblance to the earlier works of Walter John Kilner, whodidn't make the wild conclusions that Burr did. Unfortunately, regardless of lack of tenuous speculation presented as theory and regardless of the intriguing patterns observed, Kilner's research ultimately didn't amount to much more than "Hey, if you look through this dye you can kind of see a haze".

Which isn't that I think electromagnetic fields are an adequate explanation for the phenomenon. Those are, simply, the most reputable lines of study I've thus far found that could be related to the subject. Today, as interesting and occasionally (thus far) inexplicable as they are, those would hardly be considered "real science". Anything else I've found looks more like what we saw Bill Murray doing in the early scenes of "Ghostbusters".

I have experiences (concrete, numerous... and unfortunately untestable) that put me in the position of being unable to dismiss such phenomenon as coincidence, imagination, or fantasy. For that reason, I find study of the subject fascinating, but I remain very realistic about any explanations I see. Being a person of faith, I could see it being something we'd call "spiritual", but I don't believe that means we couldn't study it scientifically... just that we don't know how yet.

If you make any interesting finds, I'd be very curious to hear!