Connection Definition and 520 Threads

I posted pics a few weeks back of the new puppy, we are still looking for an official name, current working name is weeone. Here is Weeone looking over the back of our ex-male cat Chunky. Chunky has become more social since Weeone showed up. He has been pretty reclusive, to the point that he...

Two separate and independent means of observation have shown indications that the universe may have an axis of symmetry: Axis of evil' a cause for cosmic concern. 13 April 2007 Zeeya Merali http://space.newscientist.com/article/mg19425994.000?DCMP=NLC-nletter&nsref=mg19425994.000 One of...

Please click on the image to make it bigger. http://img105.imageshack.us/img105/5413/pinconnectiontw4.th.jpg At pin connnection G shouldn't there be two support reactions just like the pin connection at A? If the solution in the diagram is correct why is it correct?

I have worked out how the connection coefficients enter into the expression for the Laplacian, for example, in different coordinate systems. Does anyone have general expressions for how the coefficients enter into other expressions such as divergence and curl and grad and so on? Thanks in...

SR uses spacetime diagrams which is what is used to solve hyperbolic and parabolic PDEs but what is the connection between SR and PDEs? Are there PDEs in SR? I have done a first course in SR using Taylor and Wheeler but don't seem to recall any.

Recently I came to know about Narasimhan-Seshadri theorem. I think its a fascinating theorem connecting three major topics in mathematics, namely algebraic geometry, representation theory and differential geometry. I was looking at their original paper but fail to understand completely Does...

I have Christoffel symbols for a metric and I want to find the connection 1-forms. I have the relation: w(^i j)=Chr(^i j k)*dx(^k) w: conn. 1-form Chr: Christoffel symbols But Christoffel symbols do not share the symmetries of the conn. 1-forms. Do you know any way to make this...

I am in Gr.11 chemistry, and I am suppose to study and do a report and presentation on anything related to chemistry. My teacher suggested that I do something that I am interested in and then relate it to chemistry. So one thing that I love is music, and I am kind of stuck in terms of how i can...

I have a small network at home (with all machines running Windows XP and norton internet security). One machine is connected to the internet and shares the connection with the rest. I find it odd that all machines have a decent speed when accessing the web, except the one that serves the...

I'm reading Carlo Rovelli's book "Quantum Gravity". In the second chapter he writes down the Plebanski action by performing a decomposition of the complex Lorentz algebra into self-dual and anti-self dual parts, i.e. so(3, 1, C)=so(3, C)\oplus so(3, C). I sort of appreciate this fact and what it...

Science and the arts -- a connection? On January 4th James Palmer, a professor of optics at the UA, died from Cancer. What was interesting about Dr. Palmer was that he was not only an outstanding engineer (including winning the NASA Group Achievement Award), but he was also an outstanding...

Hi, I've MSN Messenger 7.x but I can't connect anymore. I'm behind the Windows Firewall (which I temporarely have disabled) and I'm connecting to the internet with a router, which has a built-in firewall. Can somebody help? Please.

Ok , during my study , I read that the bodies which are rotating spherically symmetrically do not emit GW;s as in don't dent the spacetime memberane...same is with the bodies moving with uniform velocity ...why is that??...has it something to do with conservation of angular momentum??:blushing:

can anybody tell me whether nanotechnology is related to materials technology or not?

im given: u=arcsin(x)+arccos(y) v=xsqrt(1-y^2)+ysqrt(1-x^2) and i need to find the functional connection between u and v. i know that: v'_x/u'_x=dv/du and i have got: dv/du=sqrt(1-x^2)sqrt(1-y^2)-xy now i need to show the rhs as a function of v or u, obviously of v should be much...

I was reading through a proof of the summation formula for a sequence of consecutive squares (12 22 + 32 + ... + n2), and the beginning of the proof states that we should take the formula: (k+1)3 = k3 + 3k2 + 3k + 1 And take "k = 1,2,3,...,n-1, n" to get n formulas which can then be...

http://www.ed.gov/policy/elsec/leg/esea02/pg112.html Of course a parent would have to know about this before requesting that their private information be protected. To me this wreaks of sleeze. The default should be to protect privacy; especially when it comes to children.

I don't know how to start solving attached problem (3.126 from Irodov) because I can't identify any series or parallel connection between capacitors. I came to an idea that I should "break" capacitor C3 into two capacitors and then get two series and one parallel connections. Any ideas?

What do fossil fuels have to do with energy?

hello, i have met with a problem. please help me. A Lie group,with a left-invariant Riemannian metric, i want to compute the connection compatible with the Riemannian metric. C(ij, k) are the structure constants, g(ij) are the metric, then how to compute the Riemannian connection in terms of...

I was wondering if anyone knows the relationship between lung mass and body mass. I'm having a hard time finding these values. Thanks.

Can familiarity be explained by neurons or the brain ? how can that be ?

Trodden argues that particle physics and cosmology "no longer exist as independent disciplines" http://arxiv.org/abs/hep-ph/0605284 The Cosmology - Particle Physics Connection Mark Trodden Plenary talk, delivered in slightly different forms at the Particles and Nuclei International...

What soft or tool can i use to interrupt internet connection to a certain established port with just one mouseclick ? Thanks

Is it just me, or is there a huge connection between Uniform Circular Motion and Gravity? A body of mass caught in uniform circular motion exerts a constant centripetal accelerating force, does it not? I don't know if it's just me, but that sounds like the exact description of gravity. So, I...

Hi, I have a question about 'breadboards.' These provide a means of wiring up a circuit. I'm a bit behind and I'm trying to figure out how to connect circuit elements in parallel using these boards. I know that each row on the board represents a 'node' of a circuit so connecting circuit...

yes this meteor is responsible for global warming. http://www.scienceagogo.com/news/tunguska.shtml

What is the relationship between force and energy?

I think I may have discovered something unique to mathematics. I made a (sloppy) webpage to explain: http://www.angelfire.com/planet/cybernetics/

I have two wireless mice both made by microsoft. These things always stop working. What a rip off! You have to turn the batteries and fiddle with them until they make good contact so that the light will shine brightly enough to work. This problem is the same on both of them! They also go through...

I have been using 4 Mbps high speed for about 6 months now and have been pretty happy with it. Just the other day my internet service provider started offering 9 Mbps for 15 extra dollars per month. Do you think that this increase in speed is worth an extra 15 dollars? Do you really think that...

It is rather well known that the color of flowers on Hydrangea depends upon the pH of the soil in which it is planted. Low pH in the soil means blue flowers and high pH means pink. Here is a quote from the Texas A&M site on Hydrangea: Sometimes a single plant may have shades of both pink and...

How does ST vary with temerature? Is there a mathematical relationship? Also, does the sound water make on splashing have anything to do with its ST?Like,hot water makes a different sound from cold water etc.

so i was reading about QED, and it said that when 2 charged particles repelled each other, it was because of virtual photons. is it true then that static electricity is caused by virtual photons, or is it an entirely different force all toghether?

OK, i know i am confusing something here big time, so...that's why I'm posting. In my book it says that regular inverter has both positive and negative threshold at 2.5V, while Schmitt-trigger has VT+ = 2.9V and VT- = 2.1V. So my question is how to make a connection (if there is any or how are...

Can someone help me find out how much lactase will breakdown a gram of lactose? I asked at our public library, with no success. (Please cite reference: e.g text, Biochem course, personal experiment data...) I am trying to make a calculation and created thread lactase query on the...

Why do unhappiness and so many worries lead people easily to sickness ? What happens in our bodies when we are unhappy, sad, and worry about someone/something so much ? Thank you...

I was reviewing my book when I got to thinking about a special type of connection, the "member fixed connected to collar on smooth rod" It prevents a force in the direction normal to the rod, and also prevents a moment. The first part is fine, but the moment part worried me a little bit. Since...

Missed by one day... (Say, I know someone whose sister-in-law is Norwedish...)

Hi! I connect 9 volts to a 1 ohm resistor and thought I would get I = U/R = 9 A. But when I connect the ampmeter, I cannot read anything! Where is the problem?

Hi. I understand the equation, but I don't understand logically in my head why it is that way. Maxwell's equations, etc show it mathematically but I'm looking for a logical explanation of why it is this way. Like for instance, the logical connection for F=MA would be "more force is needed to...

I wonder if there is a connection between that path integral formulation of QM, the nature of particles as extended objects, and spacetime. Dynamical Triangulation trys to construct the classical 4D world as a quantum superposition of various kinds of spacetime. Could it be that the path...

Has anyone ever seen or herd of an internet connection icon showing a small yellow dot orbiting it, similar to the EarthLink emblem? Specifically, a wireless internet connection icon on the taskbar of a Windows XP SP2 system. I was on the phone with my girlfriend when she told me about it...

To have a connection in GR one imposes several conditions. Among others, one condition is that the connection shall be torsion free, which leads to symmetric Christoffel symbols. My understanding is that this condition is imposed to maintain the theory as simple as possible. The absence of this...

why do we feel good when we get our hands on some food? maybe a few scientific reasons like energy, survival, etc. but I am really wanting to know why we psycologically want food? this is in relation to the dog in Pavlov's conditioning experiments

are time and light the same thing?

Is a tornado a small version of a hurricane or do they have vastly different physics? Could lots of tornadoes come together to form a hurricane?

is the Velocity Factor is a factor to caculate the length wave(gama) or its only connected to the type of the cabe

Hey guys Real quick. Is it possible to have internet connection sharing with a computer that uses dial up internet access? My parents have two computers in their house, and they only have dial up internet access available. I want to hook the two computers together with wireless...

My friend has a problem. He has a computer that has one working internet and his other computer's internet is down. They are in separate rooms but are connected by an extension cord. They are both connected to the same modem, any ideas why one is working and the other isnt? (They share the same...