Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood, rags, grasses or other vegetable sources in water, draining the water through fine mesh leaving the fibre evenly distributed on the surface, followed by pressing and drying. Although paper was originally made in single sheets by hand, almost all is now made on large machines—some making reels 10 metres wide, running at 2,000 metres per minute and up to 600,000 tonnes a year. It is a versatile material with many uses, including printing, packaging, decorating, writing, cleaning, filter paper, wallpaper, book endpaper, conservation paper, laminated worktops, toilet tissue, currency and security paper and a number of industrial and construction processes.
The papermaking process developed in east Asia, probably China, at least as early as 105 CE, by the Han court eunuch Cai Lun, although the earliest archaeological fragments of paper derive from the 2nd century BCE in China. The modern pulp and paper industry is global, with China leading its production and the United States following.
I just got this project for my physics class. I need to build a paper bridge out of only paper and Elmer's glue. The bridge must be free standing with the highest point on the bridge being the roadbed (i was thinking i could do a suspension bridge, but I can't under that guideline). The...
Past paper question - please help, still unresolved! (11/11)
Hey guys
Im studyin for my physics end of year exam (only first year so its prob easy peasy for you guys) but unfortunately i have no answer key as yet so i don't know if what I am doing is right. I get a plausable answer but i...
USA Military paper about “Psi phenomenon”... Paradigm Shift?
Hi everybody,
The USA Military has recently (year 2004) approved for public release and distribution a very interesting and controversial research document titled “Teleportation Physics Study.”
In this document they talk about...
It's a good paper. She delivered it in June at the Irvine SUSY 06 conference but we didnt get to see it until now.
It has a confusing passage on page 2, at the bottom, right before the Feynman diagram on page 3.
===quote===
In contrast to the asymptotic momenta p, the wave-vector k of the...
Hi, by reading the Einstein's original derivation of the E=mc2 formula (http://www.fourmilab.ch/etexts/einstein/E_mc2/www/), Einstein does an
approximation by neglecting higher order derivatives before arriving at
E=mc2. But, as far as I know, E equals mc2 precisely. Does anyone know why...
http://arxiv.org/abs/hep-th/0610211
Authors: Raphael Bousso
Comments: 38 pages, 6 figures. Based on a talk given at the conference in honor of the 90th birthday of Charles Townes (Berkeley, October 2005), and on a colloquium at Stanford University
After reviewing the cosmological constant...
Hi , I m greg, i am having problems with the paper 5 design experiment section. Its like when i see the question, i am totally blank i can't predict which apparatus suitable for the experiment and my exams will be in 2 days time...Is there any tips and tricks for the experiment planning...
I found an interesting paper a few weeks ago, but I haven't been able to find it again. The paper concerned using an electro-optic (LiNbO3) phase modulator to generate bandwidth on a pulse, and then using a spatial light modulator to shape the bandwidth and get a nice clean compressed pulse...
Which of these do you expect to have the greatest future influence on research? Papers are listed alphabetically by author.
A. Barrett and Connes
These are paired in the poll, since Barrett and Connes arrived at the same result at the same time.
http://arxiv.org/abs/hep-th/0608221
A...
Hi all,
I am taking modern physics this semester and just received my first writing assignment. The assignment asks me to write a short play centered on a dialogue between Issac Newton and Albert Einstein. These two scientists are to discuss the twin paradaox, with Einstein attempting to...
A http://www.arxiv.org/abs/astro-ph/0609616" claims that a super-Chandrasekhar Ia supernova has been found, and that "Super-Chandrasekhar mass SNe Ia should preferentially occur in a young stellar population."
This, obviously, could have implications for cosmology. These "new" supernovae can...
I've spent about 6 horus this weekend trying to construct to build a paper tower that will support thick textbook 14 inches off the ground. the requirement is that it weigh less than 15 g. you can use tape and paper and that's it. Cylinders cannot exceed 5 cm in diameter. Tried making a bunch...
Dcase you accidentally put this in the bibliography thread, where we don't have extra room for discussion.
Biblio is primarily for links to preprints and abstracts of selected new research---non-string QG.
Please make a separate thread to initiate discussion of any of the papers in the...
I noticed this on arxiv today. It is by a legitimate academic researcher and it MAY be reasonable for all I know. I can't judge. She is at the UNC-Chapel Hill department of Physics and Astronomy. But my initial impression is weirdness. I would like to be able to go to sleep tonight confident...
http://arxiv.org/abs/gr-qc/0609004
Calculation of the Cosmological Constant by Unifying Matter and Dark Energy
Torsten Asselmeyer-Maluga, Helge Rosé
23 pages, submitted to Adv. Theor. Math. Phys
"We show that the differential-geometric description of matter by differential structures of...
OKay this question is so vague. I need opinions on what it could possibly mean.
What happens when a person blows between two paper cups that are hung by strings 10 cm apart?
Now i am trying to imagine how this would look. Is the string going through both cups like one of those little kid...
This is something I thought I should do if nobody else would by the time I had learned enough to do it:
gr-qc/0607068:
Title: Dirac Quantization of Parametrized Field Theory
Authors: Madhavan Varadarajan
Comments: 33 pages
Parametrized field theory (PFT) is free field...
I expect this to turn out to be an important non-string QG paper this year.
http://arxiv.org/abs/gr-qc/0607014
Particles as Wilson lines of gravitational field
L. Freidel, J. Kowalski--Glikman, A. Starodubtsev
19 pages
"Since the work of Mac-Dowell-Mansouri it is well known that gravity...
hi
out of my own interest i want to present papers in various symposiums.
i am an electronics n communication enginerin student. i'd b obliged if u could provide me a list of probable topics on which papers could b presented in my field ( ECE) by me.
thanks in advance
narasimhan:smile:
Did someone give a look in it already?
Uniform discretizations: a quantization procedure for totally constrained systems including gravity
http://arxiv.org/abs/gr-qc/0606121"
The abstract is:
And it's just 4 pages long. Any comments from someone who have already read?
Hi. I'm a middle school student messing around with some paper airplanes. I am wondering how the size of the paper I use affects the properties of flight like distance and flying time and how well the plane flies. I tried a few sizes of paper and found a good one. What controls this? I know...
hey,
is it possible, that when you throw a piece of a newspaper true the window of a train, the paper enters back at the following window ?
thx
laurens
Not so sure on hwere to post this but here it is,
Im sitting here doing math homework and thinking abuot how much i hate having to bust out graph paper when i want to make a graph, i also hate normal college rule paper because of the line so i normally just use an spiral art pad for math...
PLEASE help me understand this paper! (Formal math stuff)
Right now in my class we're being given a short introduction to theoretical CS. We're learning not from a book but from our teacher's Ph.D. thesis! The thesis is HEAVY on formal math and I can't follow it... I've been trying for DAYS and...
"Black string solutions with negative cosmological constant"
By Robert B. Mann, Eugen Radu, Cristian Stelea
It is a remarkable work in my point of view. They present an arguments for the existence of new black string solutions with negative cosmological constant.
These higher-dimensional...
I want to do a research paper on quantum physics for a scholarship. I am really awed by it and want to learn everything about it. My question is, is it realistic to write a research paper on quantum physics and have it complete by october? I have bought some books on it and am reading them...
watching worldview change bit by bit is like watching grass grow.
In a preprint posted today on arxiv, Abhay Ashtekar provided a bit more support to the view that black hole bounce may bridge to another big bang
this paper is a write-up of a talk he gave last year. a large part is aimed at...
I have an 8-12 page history paper due wednesday morning and I have written only 1 page so far :groan: Any suggestions on how to get it done in an easy way? If I could, I would seriously pay someone $100 to do it. The class is so boring, I just wish they would give me a B and let me go lol...
I'm interested in understanding the physics of infinite LC ladder networks (not homework or coursework). There's a paper that looks good on the subject in the American Journal of Physics, but I don't have a subscription.
Could some kind soul who has an unlimited subscription (so it wouldn't...
So I'm writing a paper on why seatbelts are dangerous
Hello all,
I just started here and I am writing a 10 page paper on why seatbelts are dangerous. I am using the concenpts of Newton's First Law, Impulse, and Momentum. I can not stray away from those unless it proves my thesis as to why...
Why is my paper very difficult to be published?
My paper entitled Advanced gravity theory, I have submitted it hundreds times, but I still failed. I am very doubtful on this bother. Why my paper is so difficult to be published? Some editors said my paper's quality doesn't reach their...
This was a bonus problem that I missed on the last homework.
A paper tape Turing machine (PTM) is a Turing machine whose tape alphabet is partially ordered, and if a is a symbol on a square of the tape, then b can only be written on that square if b is greater than a in the partial order...
Rafael Porto is a young QG researcher who visited us at this forum and posted some in late 2004. He posted a mere 7 posts, but more recently, even when not posting, he has occasionally shown up to read.
Porto is now at Carnegie-Mellon.
Porto publishes with the team of Gambini and Pullin. They...
just posted today
http://arxiv.org/abs/astro-ph/0604544
Energy Ranking Preservation in a N-Body Cosmological Simulation
Christine C. Dantas (IAE/CTA, Brazil), Fernando M. Ramos (LAC/INPE, Brazil)
8 pages, 3 figures, accepted for publication in the MNRAS
"In this paper we present a study of the...
How much do you have to pay if you want to publish a paper or send a letter to readers on Nature ?
Please don't laugh at me, I truly never thought authors had to pay when they want to publish their papers till that day...:blushing:
Thanks
I got this question on my physics test
"What will happen if you blow over a piece of paper?"
I answered that with enough blowing, the wind created would make the paper fly off. Apparently according to my teacher, the correct answer was that from Bernouilli's theorem, the air velocity above...
I'm writing a research paper on Autism, and I couldn't find much information on fraternal twins who suffer from Autism. So really if one Child suffers from Autism what are the chances that the second will also suffer, and any other information within the twins area.
Thanks in advance
Abhay Ashtekar
http://arxiv.org/abs/gr-qc/0604013
Quantum Nature of the Big Bang: An Analytical and Numerical Investigation I
John Baez et al
http://arxiv.org/abs/gr-qc/0603085
Exotic Statistics for Loops in 4d BF Theory
Louis Crane
http://arxiv.org/abs/gr-qc/0602120
Categorical...
http://arxiv.org/abs/gr-qc/0603123
Some bounds extracted from a quantum of area
Alejandro Rivero
10 pages, no figures
"Asking very elementary relativistic quantum mechanics to meet quantums of area and time, it is possible to observe at a general level: a) the seesaw bound for the mass of...
I want to read this paper:
"Sh. M. Kogan, Sov. Phys. Solid State 5, 2069 1964."
However it is too old so I can't find it. Who can find it for me?
Can you send it to this email: hjq_seu@hotmail.com.
thank you very much!
A thing i have noticed when burning paper on an open fire, the paper has
burnt, and left a carbonized sheet, every so often a red hot thin thread
travels along it, even on a very hot roaring fire the sheet will stay intact for
several minutes, but what are these red hot threads burning.
Let's say I write a paper. It's my first paper after my (unpublished) dissertation and is written in my spare time at home.
I don't have any physics peers to show the paper too, apart from those at PF, however I am naturally worried about copyright stuff. It would be great to get it read by...
Louis Crane has contributed a great paper to Dan Oriti's "QG Approaches" book.
I started a thread on Crane's paper when it made arxiv in February, but to get a better focus on it I want to start a fresh thread.
Around 1 March, Crane corrected an error in the abstract and reposted on arxiv...
He who has read paper Phys Rev. on "Dynamical Model of Elementary Particles"
My question concerns the bound (collective) states from paper “Dynamical model of Elementary particles”. So the bound (collective) states are considered in chapter IV.
I attach the file (extract from Y. Nambu and G...