Direct Sound atau suara langsung, dalam akustik ruang kebanyakan kita mendengarkan musik diruangan tertutup dan dipengaruhi oleh batas-batas.  Sedangkan direct sound adalah komponen bidang suara dalam ruangan yang hanya melibatkan jalur langsung antara sumber dan penerima, sebelum refleksi dari dinding dan permukaan yang lain.

*) Delay fungsi dari jarak, sebagai suara bergerak di 344ms-1.
*) Tak terkontaminasi’ informasi; tingkat tinggi yang dibutuhkan untuk suara yang jelas.
*) Berperilaku sebagai suara dalam ruang bebas karena belum memenuhi batas-batas apapun.

Reff : www.postaudio.co.uk

Torricelli’s law, mentioned in the previous physics theory Friday, is derived from Bernoulli’s Principle, via a few assumptions. Let us have a small hole at the base of a large reservoir, with fluid depth h. Assuming an incompressible fluid and inviscid flow, Bernoulli’s principle says that is a constant along all points on a streamline, where v is the flow speed, z is the elevation, P is pressure, and ρ is the fluid density. For our problem, our streamlines all run from the upper surface of the fluid to the hole. Thus, choosing zero elevation at the hole, we have
,
where v_s is the flow speed at the surface of the fluid, v_h the speed at the hole, P_s the pressure at the surface, and P_h the pressure at the hole. However, we should note that P_s and P_h are both just atmospheric pressure, so that P_s=P_h, and the pressure terms cancel, giving us
.
If the hole is sufficiently small compared to the reservoir, then the flow rate out is small enough that the motion of the fluid surface is negligible; setting v_s=0, and solving for v_h, one gets Torricelli’s Law: .

Now, suppose we relax the last assumption, and do not neglect the speed at which the fluid drops in the reservoir. Assuming a hole of area a, and that the surface of the fluid in the reservoir has area A, then we see that the volume of fluid lost out through the hole is av_h; this must equal the volume from the lowering of the surface, and so . Solving for the surface velocity, and plugging into our result from Bernoulli’s principle,
.
This is larger than the speed given by Torricelli’s law by a factor of . For , this factor is approximated by , and thus it is reasonable to neglect it, sticking to just Torricelli’s law.

What does this topic have to do with Secession, you may ask? Secession is an action with its foundations in an understanding of natural law and human rights. It is always helpful to have a firm grasp of foundational truths about the universe, the cosmos and the Creator. Without this understanding, you are simply mimicking the behavior of others. And when push comes to shove, a mimic will cave in and go along. A person with beliefs that he’s willing to die for cannot be shaken.

On December 14th, I posted an article about Deism (He Is There And He Is Silent), the embrace of which has helped me find answers to the unified field of knowledge that traditional religion could never answer without some gigantic leap of faith.

Pursuant to that article, a friendly reader named Richard Storey introduced me to Dr. Thomas Campbell, a physicist and author of “My Big TOE: My Big Picture Theory Of Everything.”

Here is Part Two of his London Lecture.

Over the past couple years I have written several stories with “frog soup” as a main theme. The idea of being in cold water, and not recognizing the degree by degree increase of heat in the water, till at some point we are cooked, is the danger of being a cold-blooded animal. Business may follow a similar course.

In business we can follow the route of “this is the way we’ve always done it, and it works, so there is no reason to change our processes or strategies.” Innovations like virtualization or cloud computing hit the headlines, and many say “it is a cool idea, but we want the security and hands-on confidence of running our own servers and applications.”

In the United States many telecom companies continue to build business cases based on “milking” telephone settlement minutes, bilateral relationships, and controlling telecom “pipes.” Internet service providers (ISPs) continue holding on to traditional peering relationships, holding out for “paid peering,” doing everything possible to attain market advantage based on traffic ratios.

Nothing new, same ideas, different decade.

It is international frog soup.

In Vietnam the government is currently planning to build an entirely new information infrastructure, from the ground up, based on the most cutting edge telecom and data/content infrastructure. Children in Hanoi go to school at 7 a.m., take a quick lunch break, hit the books till around 5 p.m., take another break, and finish their day at study sessions till around 9 p.m.

Concentration – mathematics, physics theory, and language.

The children are being exposed to Internet-based technologies, combining their tacit experience and knowledge of global interconnected people with a high degree of academic sophistication.

In the United States children go to school for, at most, 6 hours a day, graduating with (on average) little capabilities in math or language – although we do have deep knowledge of metal detectors and how to smoke cigarettes in the restrooms without being caught. In Los Angeles, some locations cannot even hit a 50% graduation rate among high school students.

And oddly enough, we appear to be comfortable with that statistic.

Perhaps our approach to business is following a similar pattern. We become used to approaching our industry, jobs, and relationships on a level of survival, rather than innovation. We may not in some cases even have the intellectual tools to apply existing technology to the potential of functioning in a global economy. Then we are surprised when an immigrant takes our job or business.

Some universities, such as Stanford, aggressively recruit students from foreign countries, as they cannot attract enough qualified student s from the United States to meet their desired academic threshold. And once they graduate from Stanford, they find their way into Silicon Valley startups, with an entrepreneurial spirit that is beyond the scope of many American graduates.

Those startups have the intellectual and entrepreneurial tools to compete in a global economy, using innovative thinking, unbound by traditional processes and relationships, and are driving the center of what used to be America’s center of the global innovation world. Except that it is only based in Silicon Valley, and now represents the center of a global innovative community. Possibly due to the availability of increasingly cheaper American labor?

Frog Soup

Us Americans – we are getting lazy. Innovation to us may mean how we manipulate paper, and has nothing to do with manufacturing and business innovation. We are starting to miss the value of new products, new concepts, and execution of business plans which end up in production of goods for export and domestic use. We believe concentration on services industries will drive our economy into the future, based on products and other commercial goods imported into our country.

Except for the painful fact and reality we do not have a young generation with the intellectual tools to compete with kids in Hanoi who are on a near religious quest to learn.

The temperature is rising, and we as a country and economic factor in the global community is being diluted every day.

Time to put away the video games and get back to work. No more “time outs,” only time to roll up our sleeves and learn, innovate, learn, innovate, and innovate some more. Forget comfort, we are nearly soup.

This is my first video in HD, as well as the first use of high-speed photography.

This demonstration is not a “DIY” video.  Do not try this yourself.

Watch on Youtube from here.

Scitoys.com has an impressive array of science gadgets that kids and adults will enjoy making.  The website even has an online store that sells everything you need to make some of the gadgets.  However, your local RadioShack should have much of the items needed.  What sets this website apart from most other science websites for kids is that many of these projects support learning advanced science and engineering concepts.  For example, there are lessons on building your own hydrogen fuel cell, extracting DNA in your kitchen, and a simple (but cool) electric motor.  Additionally, Scitoys.com always explains the physics theory, chemical, biological and mathematical principals behind the devices.  So, if you are looking for real science engagement (beyond the tired old vinegar-baking soda volcanos), build a few science gadgets and learn some really advanced science concepts along the way.

the atom

There are two ways of trying to know anything. Only two to be precise, there can be no third way! The First is which Science employs-knowing the subject. Herein the basic assumptions that the subject knows itself & tries to find out about the objective the WORLD (the external world).Here we may substitute physics theory also for Science as physics theory is the most aggressive branch, out of all. It is the true Science-rest all are applied sciences.

When mankind begins for such a journey, one thing is presumed that everything is already known about the subject or the KNOWER or the Human mind,or Consciousness to be precise.

There can be one more way, the way of spirituality or VEDANTA-the most enlightened form of spirituality. This way begins from introspection, without presumptions & prejudices. VEDANTA says that the subject itself is unknown!

According to VEDANTA, presuming the world to be objective is a flawed thinking. Unscientific of course! How can the subject (Me or the human mind) know the object (world or Physical realm) if I myself do not

know my own basic nature? or HOW DO I KNOW WHAT I KNOW?.VEDANTA attempts to know objectively the KNOWER. In such an attempt, it gradually reaches a stage where it discovers that the basic attempt

to objectively know the world itself, or to consider the Physical world separate from us is incorrect. There is no true Physical world except in our thoughts. It is just the consciousness which perceives, names, analyses & concludes about the World. Hence, the great discovery of VEDANTA is that the subject (the KNOWER) itself is the object & hence can not know the world objectively.

To put it simply, CAN THE PART KNOW THE WHOLE?. The beauty of VEDANTA is that it does not conclude on preformed hypothesis, rather than getting answers it creates some of the most beautiful questions.

WHO AM I?

HOW DO I KNOW WHAT I KNOW?

WHO IS THE KNOWER?

CAN THE PART KNOW THE WHOLE?

WHAT IS REAL?

WHAT IS-”the IS”?

WHAT EXISTS OUT OF TIME & SPACE?

The whole observations of Vedanta are far more scientific & complete than of the modern sciences. And hence many common observations occur. The famous Bell’s theorem forces us to accept the validity of the concept of BRAHMAN-the ultimate consciousness.

Some of the conceptual enigmas of Quantum physics theory are also explainable by VEDANTIK deliberations. e.g Modern Quantum physics theory now knows that all matter on this earth is practically composed of sub-atomic particles

such as protons, neutrons & electrons. These particles have the same nature, no matter what element they constitute i.e the electron of carbon is essentially the same as that of Hydrogen.

Hence all matter being composed of one thing only seems plausible.

Second the basic constituent particle i.e electron displays dual nature-both MATTER & wave mechanics-both explainable with physics theory Experiments. Same way light also displays “DUAL NATURE”-explained well by Photo-electric effect & Young’s double slit interference experiment.

As a VEDANTIK, my humble submission is that the attempt to know weather matter is particle or wave mechanics & the same way for light is futile. Honestly, it is MATTER-O-wave mechanics. Sometimes matter, sometimes wave mechanics. Because, the duality of wave mechanics & matter is artificial! Not real. Nothing is there which is only matter or only wave mechanics!!!

The human senses have a limit of knowing-both upper & lower limit.

e.g. we hear 20 hz & then up to 20,000 Hz (Infrasonic & Ultrasonic being inaudible).Same goes for eyes (eyes do not see distinct object in less than 1/20 sec),similar for nose (Dogs smell very well what we can’t).

the touch receptors at the back of man can’t distinguish two points of touch if separated by less than 20 cm. The list of limitation of human senses can go on & on & on.

The instruments of physics theory laboratory are nothing but extension of our sense organs only. e.g. a microscope is a better eye, a particle counter is a better sense organ.But alas all in vain!

The famous theorem that” the position & the velocity of a particle can not be simultaneously known” puts a stop to the knowing of “simultaneous” events. As nothing can travel faster than speed of light ,than how do we know what is simultaneous?

VEDANTA says that the subtle or “sukshma” is something which can not be comprehended by sense organs. However, refined or better the equipment may be. The consciousness doesn’t exists in the frame of space & time, the sense organs do.

We can go in the form of a corollary-TO KNOW WHAT EXISTS BEYOND SPACE & TIME, THE KNOWING TOOL ALSO HAS TO BE OUT OF SPACE & TIME”.

The famous Einstienian observation that “we can not objectively know the frame, if we are a part of the frame”

To put it simply, how can a man in train see/observe the train if he is inside the moving train? The actual right observation will be made only by a man on platform!

Now for the big result-that -if we are able to comprehend something which is out of frame of space & time than the tool is also out of frame of space & time.

Hence, the big mahavakya-Tat Twam asi!!! (Thou are that!!!).

In meditation, the VEDANTIK knower discovers that the all pervading, all existing consciousness is out of the frame of space & time. If such a perceived consciousness, the Godly consciousness, the eternal space or the BRAHMAN can be perceived than it is a true by corollary that the knowing consciousness or the enlightened consciousness is also of the same nature as BRAHMAN.

The following example contains the answer:

When we create a pot, than we observe that the pot contains some space. Let’s call it “POTSPACE” or the GHAT-AKASH. Now suppose the pot is broken than where does the space in the pot go?

Is it where it is?

Did it appear & disappear with the pot?

Was it not there, from the very beginning?

The VEDANTIK knows that the appearance & disappearance of space is just an illusion. There was always one space from the very beginning-the eternal space. Nothing appeared & nothing disappeared. The creation & destruction of the pot creates the illusion.

Apply it on your life.Your birth & death.And you’ll know it all.

The Man makes the mistake of associating himself to be the pot, while he is the space itself. But, this realization of being the eternal space doesn’t occur easily.

While dreaming-Is it easy to know that you are dreaming?

Arise,Awake & Stop not till the goal is achieved!  (Kathopnishad)

So I’m building this application to use in our lab at Clemson to keep tabs on all the sensors around the equipment. I’m not going to copy over the whole post here but for anybody who has an interest in following my coding endeavors can check out my post at http://ionsurfing.wordpress.com/2009/12/30/mockupsunusable-alpha-screenshots-for-tactile/. I’ve got some nice screenshots and explanations of where I’m going with the program. I think the biggest challenge will be finding a good way to deal with human interaction using an old-style touchscreen. Any and all suggestions on libraries to look into or thoughts on UI challenges are welcome.  :)

By the way, thanks to Mairin for her Inkscape mockup class at FUDCon… I actually used it!

“The heart has its reasons which reason knows nothing of.” – Blaise Pascal, French mathematician, physicist (1623 – 1662)