article Definition and 345 Threads

I'm familiar with the delayed choice experiment, and I'm trying to suss out this new setup. http://www.sciencealert.com/reality-doesn-t-exist-until-we-measure-it-quantum-experiment-confirms Reading this article is not very beneficial if there's a confounding typo. Paragraph 10: Should that...

I reading article "The Cosmological Constant and Dark Energy" P. J. E. Peebles, Bharat Ratra http://arxiv.org/abs/astro-ph/0207347 They use following sources of density: ## \Omega_{M0}+\Omega_{R0}+\Omega_{\Lambda0}+\Omega_{K0}=1## Next I see " The measurements agree with the relativistic...

https://chronicle.com/article/How-Science-Literate-Are-You-/229753/This appeared in my news feed on the old Facebook, and my interest was piqued. Upon taking the quiz myself, I discovered a few noteworthy things. First of all, to my surprise, I was reported to have missed one of the eleven...

I am In high school and its my last year.I want to write an scientific article.I am working on something.I have original ideas and I want to share them.But I don't have any idea about how to write a scientific paper.And also I don't know where I will going to send the paper. Is there any...

"In quantum gravity, the problem of time is a conceptual conflict between general relativity and quantum mechanics. Roughly speaking, the problem of time is that there is none in general relativity. This is because in general relativity, the Hamiltonian is a constraint that must vanish. However...

I thought this was an interesting article on dark matter, what might this kind of DM be made from? I also wondered could DM help explain in some way where all the anti matter ended up? http://www.space.com/27794-dark-matter-destroying-neutron-stars.html

2015 is the International Year of Light and Taylor & Francis have a free online article collection. Find out more and read the articles here: http://explore.tandfonline.com/content/est/physics

This is not a homework problem, this is a question borne out of self-interest. I picked up the book "The Dreams that Stuff is Made of" by Stephen Hawking: (https://www.amazon.com/dp/0762434341/?tag=pfamazon01-20 ) and read the first article by Max Planck: "On the Distribution of Energy in the...

I read an article about creating molecules from photon, and this part- As the photons enter the cloud of cold atoms, Lukin said, its energy excites atoms along its path, causing the photon to slow dramatically. As the photon moves through the cloud, that energy is handed off from atom to atom...

Maybe this article is more readily available than I'm aware of but thought it would be of interest to some- 'The Quantum Mechanics of Black Holes' by Stephen Hawkings http://planck.phys.uwosh.edu/rioux/thermo/pdf/Black%20Holes%20--%20Hawking.pdf

I'm trying to find On Certain Valuations of the Vertices of a Graph by Alexander Rosa I've looked for a couple days but I can't seem to find it anywhere online or at my library. Any suggestions?

Black Holes Inch Ahead To Violent Cosmic Union -- Dennis Overby NY Times article today on merging black holes. Describes possible observation, implications of a pair of merging black holes. Suggests lots of research possibilities for gravitational wave astronomy. Some specific research is...

An article on a possible alternative to dark energy. Time dilation and Lorentz transformations are discussed as an alternative to dark energy: http://phys.org/news/2014-12-alternative-explanation-dark-energy.html "The accelerated expansion of the universe has been attributed to the effects of...

Could people with expertise in the relevant field(s) please tell me what you think of the contents of the following article, with a focus on the suggestion that it could lead us to redraw the web of life: http://en.wikipedia.org/wiki/Dendrogramma Many thanks for all replies.

Sharing this article with a beautiful graphic timeline: http://www.bbc.com/future/story/20140105-timeline-of-the-far-future

Hello All, I am searching for the following article: O A Ovanov, L V Solina, and V A Demshina 1973 Phys. Met. Metallogr. 35 81. Or at least the link for the above. Thanks, Rajini.

Today's _Out There_ column ( in the New York Times) by David Overby takes a look at the physics of _Interstellar_ and the reception thereof by various audiences. Interesting article. It can be found on page D1 of the print edition. Links- (One is the article's formal permalink, the other...

I was confused by a NASA pdf document about flight physics. I provide quote from NASA document instructor's flight manual, flight testing Newton's laws. Document is categorized DFRC-X41-1. Did NASA use some fast-and-loose language right there? Imprecise definition of drag using Newton third...

Article on better learning strategies for courses and test preparation. http://www.bbc.com/future/story/20140917-the-worst-way-to-learn

Hi, I'm an undergraduate EE major and am having trouble understanding IGBT. I understand the basic principle, a PNP transistor in ? (forgot the name) configuration with a MOSFET with a parasitic NPN transistor. I understand that it's a 4 layered device. I however think I would struggle trying...

Forwarded an article onto a Professor of Physics, and he replied with a comment about an article he'd written for Nature. The link is http://www.nature.com/news/physics-bell-s-theorem-still-reverberates-1.15435 I thought I'd share it with you as some may be interested in reading it.

Hello everyone, I recently finished my PhD and I have started publishing my new results. I have a very good paper that builds the background for several others. I submitted the paper to the 2nd important journal in my field and after 2 months none of the 3 reviewers responded and the journal...

It is available for free from this source. If someone can explain what has really been done here in simple English, please do so. Don't just quote popular news sources, which are almost worthless.

hi, who can help me with this article because in my university its not avaliable thanks http://scitation.aip.org/content/aip/journal/jmp/8/2/10.1063/1.1705193

From an article published on the Atlantic ( http://www.theatlantic.com/magazine/archive/2013/11/the-man-who-would-teach-machines-to-think/309529/ ) : "The technique is called “machine learning.†The goal is to make a device that takes an English sentence as input and spits out a French...

I'm trying to understand the strategy being put forward by the wikipedia article on quantum pseudo-telepathy to win the Mermin-Peres magic square game. It's frustrating, because I do understand how pseudo-telepathy works, I just can't make heads or tails of the grid in the article: I get that...

http://www.dailymail.co.uk/sciencetech/article-2503370/Quantum-physics-proves-IS-afterlife-claims-scientist.html Valid information,or can this article be dismissed as pseudoscience?

Wikki says the following with respect to Unruh effect: http://en.wikipedia.org/w/index.php?title=Unruh_effect&oldid=563459371 I'm not at all sure it's accurate though. I seem to be getting myself more confused as I try to think about this, starting with the issue of whether the temperature...

I would like to know how this article applies to the possible existence of FTL particles. Does it point to a possible violation of c as the ultimate speed limit of a particle? In layman's terms what is this paper saying? http://arxiv.org/abs/1309.3713 Thanks

The article is about something spinning at an incredibly high rate, with a blurb from the scientist saying that the spin rate is so high that the angular acceleration is compared to gravity - which makes no sense since gravity is a linear acceleration, and as well, if it were the tangential...

Is there is a problem in writing an expository article in a college science magazine run by a student group on a topic similar to research that I did over the summer? I thought it was very interesting and included some material from articles which I looked at then. The main reason why I'm...

Here is an interesting article from the Economist regarding evidence of "bandwagon" behaviour in the labour market; the chief message of the article being that missing out on one job application has negative consequences on future opportunities...

In the 1970s, Scientific American published a great article on stellar collapse and type II supernovas. It described the evolution of the collapse millisecond-by-millisecond. I would love to re-read it. Does anybody remember the title and author?

http://www.tlnt.com/2013/07/26/how-job-candidates-lie-and-the-best-lies-they-always-seem-to-tell/ The article discusses some lies that are told in job interviews and a recruiters take on them. Now, I do not condone lieing but this compelled me to question the situation where the only option...

I want to verify there are typos in page 11 of http://math.arizona.edu/~zakharov/BesselFunctions.pdf [SIZE="5"] 1) Right below equation (51) \frac{1}{2\pi}\left(e^{j\theta}-e^{-j\theta}\right)^{n+q}e^{-jn\theta}=\left(1-e^{-2j\theta}\right)^n\left(e^{j\theta}-e^{-j\theta}\right)^q There...

Wonder what some of you with experience think of this article, as much of it contradicts what I've been told: is the job market for engineers hard or soft?

Hello all, I have been tasked with actually writing my own paper for the ApJ, rather than just submitting my results to my professor and letting him do the work. So, my question is this: Is there a place where I can get a sample tex file from the ApJ? I've seen many crap example files...

Universe geometry article simpify? article development for the Forum on geometry suggestions, as well as any errors etc are welcome particularly on how to keep the FLRW metrics but simplify the explanation... Universe geometry The origins of the universe is unknown in cosmology. The hot...

I've been developing an article on universe geometry that hopefully forum members will find as a useful reference,and would like some assistance in examining the accuracy, means of simplifying and details forum members would like added. The article is on a personal website that references...

Developing a basic explanatory manual for the Light cone 1.0 calculator. This is as a supplement to give a basic understanding on what the terms used in the calculator mean. The user manual is separate as is the advanced manual which shows the math forms used in the calculator. The CMB...

I will produce a thin film. it will be CoO. I could not find the article about it. undoped and doped lithium CoO. I need your help and your idea. thank you :)

I found a really awesome article on determinism in science as a general concept, but I can't seem to find it anymore. It explained how certain differential equations can have the same "past" but different "futures," and vice versa, and used that as a model to discuss determinism.

In a recent volume of Science magazine, there was a very interesting article on the genesis of migraine. However I found it very difficult to follow as a non-specialist. Someone would like to comment on it? Spreading Depression Triggers Headache by Activating Neuronal Panx1 Channels...

Universe as an Infant: Fatter Than Expected and Kind of Lumpy http://www.nytimes.com/2013/03/22/science/space/planck-satellite-shows-image-of-infant-universe.html?nl=todaysheadlines&emc=edit_th_20130322the universe may be 13.8 B years old [a bit older than thought] and expanding more slowly...

I have been working on an article covering Redshift. The article is in this thread https://www.physicsforums.com/showthread.php?p=4307715#post4307715 I would like opinions, recommendations and any other contributions that forum members feel would be good to add.

Hi there. Just looking at an astophysics journal article in which they say the temperature of a pulsar is T=300eV.. My query is the following: is T=300eV shorthand for say T=300ev/k (k=Boltzman constant) so the corresponding temperature in Kelvin is T=3.75X10^6K?

Here is the abstract: http://pubs.acs.org/doi/abs/10.1021/nl304680w I would need to pay the $35 so I have not read the full text. Question: it says "...without Light, Heat, or Electricity." Where is the energy required to split the water molecules coming from? Jeff

"APS Physics" view of pre-inflation cosmology article The APS has an online periodical that publishes "Viewpoints" on current research, for instance http://physics.aps.org/articles/v5/142 is an interpretive explanatory viewpoint, written for non-specialists, on the article by Agullo Ashtekar...

Hello all, I've been encourage by my professor to participate in an open discussion regarding the article I've attached to this post. See below for link! The article is quite dated as it is from IEEE SPECTRUM June 1985, but it is nonetheless still useful. As a brief summary of the...

This is a linear algebra question, but it's about an article about Minkowski spacetime, so I think it's appropriate to post it here. The article is The rich structure of Minkowski space by Domenico Giulini. The detail I'm asking about is at the top of page 16. The article is describing the...