Global Definition and 430 Threads

I'm just wondering if Global Warming is considered a fact within the science community? I'm not talking about man made global warming, just global warming in general whether it be caused by nature or man.

I am having trouble forming the Global Stiffness Matrix for a planar truss. Does anyone know of any good online resources to help me with this? I've found a few, but haven't been much help.

Is there any proof that it is the CO2 levels that cause the temperature increases, and not that increasing global temps by themselves increase CO2 levels? It seems to me that the warmer it gets the more things would grow as long as they had sufficient water, if more things are growing then more...

ABC News-->US Military: Global Warming Helps Taliban Apparently terrorism is our fault due to our greenhouse gas emissions. We have been supporting it for years. This is probably one of the most far reaching news stories I have ever seen. Listen for yourself. I can't believe that they are...

Hi all, Im a international student and studying a project about expain Physics used in the development and use of the Global Position System(GPS) I just want to get some ideas about where I can start to do research. I mean did some one give me some points and infomations for this topic...

Do dark surfaces exposed to the sun really contribute to global warming?

At school I am constantly called stupid, or an idiot because of my global warming skepticism. I do not try to get into debates, but kids who think the have a good understanding of global warming try to anchor me to debate them. Although I try to avoid debate I do eventually get in them, and...

Many interesting proofs in GR (regarding black holes and singularities, etc.) involve topological methods. However, I don't understand how a theory embodied in Einstein's equations, which appear to me to be local rules of evolution, can ever change the topology since a patch of spacetime...

could anyone help me ? i know global position of three flag for example (10,20,30) and i have my distance , phi and theta to flags . could anyone helping me find my position ?

Hello. I am a fiction novelist and a new member here at PF. I write mostly futuristic sci-fi stories so I'll probably be poking my head in from time to time with new questions for you guys. I'm very anal and a stickler for scientific accuracy (or at least as close to accurate as I can get and...

Hello everybody! I have been reading about the evolution of population growth since 1950 till now. It had many factors such as development of technology, of medecine, ... Now i want to calculate the future population growth let's say for example for 2050. In those readings i found also those...

Hello everybody! I have been reading about the evolution of population growth since 1950 till now. It had many factors such as development of technology, of medecine, ... Now i want to calculate the future population growth let's say for example for 2050. In those readings i found also those...

I've heard a lot of scientists talk about it like it is a fact. They say that it is unnatural and caused by humans. The Earth goes through times where the temperature is very low (the ice age), and times when it is higher. One of those times is right now, I can't understand why so many people...

I'm worried what people will do to try to 'fix' Global Warming.

The major conclusion: “A link between the Sun, cosmic rays, aerosols, and liquid-water clouds appears to exist on a global scale…” http://docs.google.com/gview?a=v&q=cache:k3yiHsNVc1cJ:www.wzforum.de/forum2/file.php%3F0,file%3D11877 keep in mind that solar modulation of clouds of even 2-3...

http://www.timesonline.co.uk/tol/news/environment/article6366639.ece That should read that it would yield the same benefit as removing all of the cars for 11 years... https://www.youtube.com/watch?v=pLlxjYACa5U

When it comes to global warming from CO2, the toughest question is how are clouds going to respond? The IPCC has about 20 different climate models, but only one includes a change in cloud cover. The reason is that there hasn't been much evidence (until now) about how clouds would actually...

I was pondering a posible global warming demonstration. Two identical clear cubes with thermometers in the center. they have some 1 way valve at the top. Put dry ice in one. The one containing the dry ice is initally cooler, but as all of the dry ice evaporates, the cube fills up with CO2...

Hi, I have the following question. In "Joyce D.D. Compact manifolds with special holonomy" I read on page 125 that a compact Kaehler manifold with global holonomy group equal to SU(m), has vanishing first betti number, or more specifically vanishing Hodge numbers h^(1,0)= h^(0,1) = 0...

hey guys! why don't we just pump the excess water out the Earth's atmosphere into space? just build a pipe into space? nobel prize here i come...

While glacier shrinkage is occurring almost everywhere, it's possible this could be reversed in high latitudes if continued global warming (GW) is moderate. This is important, because in the best of circumstances, we will not be able to reverse global warming in the foreseeable future. The best...

I've been watching many documentaries on global warming these days. One of them said that: It was a BBC channel documentary. Global warming is causing the temperature of the Earth to rise. Global warming is due to increased CO2 levels in the atmosphere. This CO2 is attributed to human...

http://www.cbsnews.com/blogs/2009/06/10/world/worldwatch/entry5076823.shtml Well, here's something I don't think I've heard anybody predict. I think the biggest question is how did CBS get their hands on this tape?

Ancient Volcanic Eruptions Caused Global Mass Extinction http://www.sciencedaily.com/releases/2009/05/090528142827.htm

From: http://en.wikipedia.org/wiki/Quantum_mechanics#Mathematical_formulation ... In the mathematically rigorous formulation of quantum mechanics, developed by Paul Dirac[7] and John von Neumann[8], the possible states of a quantum mechanical system are represented by unit vectors (called...

I wonder if many have actually heard of the Global Consciousness project (GCP). Here is a link to their home page. http://noosphere.princeton.edu One of their aims was to deduce whether human consciousness affected random number generators and apparently, increase in collective...

I have a friend who claims that we have only seen the tip of the iceberg wrt the global derivatives market. I am posting this because I don't know enough about his concerns to address subject - I don't know if this is a credible concern or not. His perspective is that, less China, global...

Homework Statement Find the dimensions of of the rectangle with perimeter 200 meters that has the largest area. Homework Equations The Attempt at a Solution This is in the section on Global Maxima/Minima so I know it has to be something with graphing a formula and finding the...

In another thread (see msg #17 of "Only dirty coal can save the Earth"), user Bystander suggested I lay out more carefully for critical examination the physical basis for the impact of CO2 on climate, so that the assumptions can be seen clearly. This is an excellent idea, and here is my attempt...

This is the reason why we should invent hybrid cows. :) http://news.yahoo.com/s/time/20090411/wl_time/08599189064600 Zz.

Approx. 14,000 years ago, a large percentage of the globe was covered in ice. Estimates vary from one third to one half of the globe covered. This was the result of a several thousand year build-up. The passing of each winter/century/decade/millenium, would have seen an increase in the ice cover...

Hi: I am trying to understand more geometrically the relation between triviality of bundles and existence of global sections. This is what I have for now. Please comment/critique: Let p:E-->B be a fiber bundle : consider E embedded in B as the 0 section. Then...

I have recently completed S. Fred Singer's marvelous book, Unstoppable Global Warming Every 1500 Years In it, Fred shatters just about every global warming myth in existence. Of course Fred is a world authority on climate physics, and as such, he thoroughly documents his findings. About...

Global warming is happening, it could however we a natural cycle that the Earth goes through and little effected by humans, we really don't know for sure. We sure should hedge our bets and try not pollute this planet but it seems that these global warming activists have an unstated major premise...

1. Is an annual increase of lightning strikes worldwide a measure of global warming? 2. What has been the correlation between such discharges and temperature in recent decades?

Does anyone else believe that we are not going through global warming but actually and ice age?

Ouch, $289 million. I wonder why it malfunctioned? http://news.yahoo.com/s/ap/20090224/ap_on_sc/sci_carbon_satellite

The temperature of the Earth is governed by physics, namely the Stefan-Boltzmann law which states that the amount of energy radiated is proportional to the fourth power of its temperature. ERad = SB * Temp^4. Or Temp = (ERad/SB)^0.25 Where: SB, the Stefan-Boltzmann constant is 5.670 x...

How much weight if any, should be given to public opinion to scientific theories that are, let's say difficult to prove, and could have significance effects globally.

Some people tend to think of Global Warming in term of air temperatures on the surface of the earth. However, the Earth is composed of many more things that can absorb heat energy. Interestingly, there is not as much coverage on all the other parts of the Earth as they don’t have as much of an...

:) Zz.

When air goes through a carbon filter it separates the carbon and turns it into water and lithium carbonate. Could the lithium carbonate be sold and that money used to buy parts for hydro electricity plants that use the water, or the water be used for drinking as it is already pure?

There is a thread on the US economy, but the problems are globally endemic. All national and regional economies are affected, and the problems undermine security and general welfare. It appears that the global economic crisis realized in 2008 is more severe than expected. Downturn...

Hi everyone, This is my first post and I hope to get some better understanding of something that has been bugging me. I understand (global) gauge invariance in the sense that |\psi\rangle denotes the same (physical) state as e^{i\varphi}|\psi\rangle, or more generally, the physical state...

According to HadCRU global temperature warming per decade has been .12C with uncertainty intervals of .13C (since 1995) (using Santer17 formula) which given my thoughts of an upward heating bias due to data handling and urban heat island effect still indicates that since 1995 - there has been no...

I have read that some Scientists do not believe that the emissions from industry, power stations, transportation etc is the ultimate cause for a global warming scenario & they can't put there finger on another cause. Of course science is the study of what we don't know rather than what we do...

Officially there is no global warming (NOAA ,October 8, 2008, National Weather Service JetStream - Online School for Weather) http://www.srh.noaa.gov/srh/jetstream/atmos/ll_gas.htm quote It has been thought that an increase in carbon dioxide will lead to global warming. While carbon...

Let's compare the four predominant data sets about the global temperature updated to include October 2008: Shown in thin lines are the monthly averages while the thick lines represent 12 months running averages. Red and orange are based on surface meteo station data as compiled by NASA...

Homework Statement Find the global extrema of the function f(x,y)=sinxy on the closed region given by 0<x<pi and 0<y<pi. You must provide a complete analysis of the function both inside the region and on each of the boundary lines. Be sure to clearly indicate the maximum and minimum values and...

There are threads about 'What's wrong with the US economy", but I thought it would be interesting and worthwhile to look at what's going on with various economies around the world. For example - Iceland's economy crashed. http://www.nytimes.com/2008/11/09/world/europe/09iceland.html How...