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173
Apr 18, 2014
04/14
by
Amy & Shane Bugbee
movies
eye 173
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this is a continuation of the steven leyba footage mistakenly added to the april 12th 2008 date. conversation include: starting his own religion, living life on your own terms, doing the dishes and the need for dishwashers, when survival and creativity collide, the positive of polio on the reservation, true change, steven reads from his diary regarding blood working and stabbing his cock to shoot blood on his art, explaining the wheel of confusion, the book of days. The A Year At The Wheel...
Topic: A Year at the Wheel
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67
Apr 18, 2014
04/14
by
Amy & Shane Bugbee
movies
eye 67
favorite 0
comment 0
18 seconds of shane and amy working at a rum factory. WANT TO HELP WITH THIS COLLECTION? http://www.patreon.com/creativeclass LIKE WHAT YOU SEE? http://www.patreon.com/creativeclass WANT TO GIVE BACK?? http://www.patreon.com/creativeclass PLEASE VISIT OUR PATReON PAGE: http://www.patreon.com/creativeclass
Topic: A Year at the Wheel
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1.0K
Apr 18, 2014
04/14
by
Amy & Shane Bugbee
movies
eye 1,038
favorite 0
comment 0
all or nothing tattoo is visited, do you vote is asked and answered and tattoo talk too. brandon bonds all or nothing tattoo is visited and person on the street question asked was do you vote? odd news clip at the end of this date. WANT TO HELP WITH THIS COLLECTION? http://www.patreon.com/creativeclass LIKE WHAT YOU SEE? http://www.patreon.com/creativeclass WANT TO GIVE BACK?? http://www.patreon.com/creativeclass PLEASE VISIT OUR PATReON PAGE: http://www.patreon.com/creativeclass
Topic: A Year at the Wheel
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60
Apr 18, 2014
04/14
by
Amy & Shane Bugbee
movies
eye 60
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comment 0
brief "b-roll" of amy working at a bakery and a bit of a historic building. as the bugbees were busy working on their book and movie and getting ready to head to Washington D.C. for election day they didn't shoot any more interviews. The A Year At The Wheel BOOK: https://archive.org/details/sufferandcelebrate_ebook The Suffering and Celebration of Life in America THE BOOK The A Year At The Wheel FULL LENGTH MOVIE: https://archive.org/details/sufferingandcelebrationoflifeinamericamovie...
Topic: A Year at the Wheel
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112
Apr 18, 2014
04/14
by
Amy & Shane Bugbee
movies
eye 112
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cheyenne and myrtle playing in a stream in austin texas as the bugbees figure out their next move with only $20 and and empty tank of gas. The A Year At The Wheel BOOK: https://archive.org/details/sufferandcelebrate_ebook The Suffering and Celebration of Life in America THE BOOK The A Year At The Wheel FULL LENGTH MOVIE: https://archive.org/details/sufferingandcelebrationoflifeinamericamovie - The Suffering and Celebration of Life in America THE MOVIE KEY TO ARCHIVE:...
Topic: A Year at the Wheel
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168
Apr 18, 2014
04/14
by
Amy & Shane Bugbee
movies
eye 168
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today the bugbees say good by to ugly shyla and visit dimebag darrell's grave, they pour some old new orleans rum on the grave. The A Year At The Wheel BOOK: https://archive.org/details/sufferandcelebrate_ebook The Suffering and Celebration of Life in America THE BOOK The A Year At The Wheel FULL LENGTH MOVIE: https://archive.org/details/sufferingandcelebrationoflifeinamericamovie - The Suffering and Celebration of Life in America THE MOVIE KEY TO ARCHIVE:...
Topic: A Year at the Wheel
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113
Apr 18, 2014
04/14
by
Amy & Shane Bugbee
movies
eye 113
favorite 1
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the third night of the partying jeff becerra, no sleep for three day… footage is very interesting, shot in night vision - some really great and strange drug induced all over the place conversation. if you like a strange drug induced conversation. conversation includes: jeff wants to play god vs. satan, jeff advises shane to walk each day to live longer, depression, evolution, drug talk - coke vs. speed, jeff talks about quitting drugs, has never been sober for more than 3 years, jeff talks...
Topic: A Year at the Wheel
ladies krewe Source: https://www.youtube.com/watch?v=nybEVHo3hiE Uploader: BigRedCotton Upload date: 20081203
Topics: Youtube, video, Entertainment, Second Line, TBC Brass Band, Ninth Ward, Nine Times, Parade, New...
Buckjumping at its finest! Source: https://www.youtube.com/watch?v=GNYGheRf8e0 Uploader: BigRedCotton Upload date: 20081208
Topics: Youtube, video, Entertainment, Dumaine, Street, Gang, Second, Line, Parade, New, Orleans, Rebirth,...
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783
Oct 22, 2010
10/10
by
Alex Smith
audio
eye 783
favorite 0
comment 0
Green Sisters Catholic women's environmentalism Sarah Taylor McFarland "Missionaries to the Planet: Green Sisters, Catholic Environmentalism, and the Renewal of Religious Life." 10 years of research. Recorded in Toronto, Canada by J.P. Warren, on May 22nd, 2008. 54 min CD quality 50 MB or Lo-Fi 13 MB
Topics: radio, environment, green, Greens, ecology, environmentalism, religion, speech, Catholic
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37
Jul 19, 2012
07/12
by
Global Lives Project
movies
eye 37
favorite 0
comment 0
This is part of a 24-hour recording of a day in the life of Dadah, a farmer from Sarimukti Village, Indonesia. She was 32 years old at the time of the shoot. Dadah is a mother of three from Sarimukti, a Sundanese village in the highlands of West Java. She and her husband are farm workers on a state-owned plantation that dates back to Dutch colonial days. They are practicing Muslims and active members of the Pasundan Farmers' Union, which lobbies for both land re-distribution among farmers and...
Topics: Sarimukti Village, Jakarta, Indonesia, globallivesproject, Global Lives Project, glp, globallives
35
35
Jul 19, 2012
07/12
by
Global Lives Project
movies
eye 35
favorite 0
comment 0
This is part of a 24-hour recording of a day in the life of Dadah, a farmer from Sarimukti Village, Indonesia. She was 32 years old at the time of the shoot. Dadah is a mother of three from Sarimukti, a Sundanese village in the highlands of West Java. She and her husband are farm workers on a state-owned plantation that dates back to Dutch colonial days. They are practicing Muslims and active members of the Pasundan Farmers' Union, which lobbies for both land re-distribution among farmers and...
Topics: Sarimukti Village, Jakarta, Indonesia, globallivesproject, Global Lives Project, glp, globallives
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61
Jul 19, 2012
07/12
by
Global Lives Project
movies
eye 61
favorite 0
comment 0
In this clip, Kai is at the market. This is part of a 24-hour recording of a day in the life of Kai Lui, a cafeteria food purchaser and convenience store manager from Anren, China. He was 37 years old at the time of the shoot. Kai Liu grew up in a small village in rural Sichuan, China. After marrying Delian, they migrated to Anren- a national key town 25 miles from the city of Chengdu- where they found work and lodging managing a convenience store. They have one daughter, and much of their...
Topics: Sichuan, China, globallivesproject, Global Lives Project, glp, globallives
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29
Nov 9, 2018
11/18
by
Clark, Catherine, 1962-
texts
eye 29
favorite 1
comment 0
327 pages ; 18 cm
Topics: Families -- Fiction, Vacations -- Fiction, Photography -- Fiction, Interpersonal relations --...
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32
Jul 19, 2012
07/12
by
Global Lives Project
movies
eye 32
favorite 0
comment 0
This is part of a 24-hour recording of a day in the life of Dadah, a farmer from Sarimukti Village, Indonesia. She was 32 years old at the time of the shoot. Dadah is a mother of three from Sarimukti, a Sundanese village in the highlands of West Java. She and her husband are farm workers on a state-owned plantation that dates back to Dutch colonial days. They are practicing Muslims and active members of the Pasundan Farmers' Union, which lobbies for both land re-distribution among farmers and...
Topics: Sarimukti Village, Jakarta, Indonesia, globallivesproject, Global Lives Project, glp, globallives
38
38
Jul 19, 2012
07/12
by
Global Lives Project
movies
eye 38
favorite 0
comment 0
This is part of a 24-hour recording of a day in the life of Kai Lui, a cafeteria food purchaser and convenience store manager from Anren, China. He was 37 years old at the time of the shoot. Kai Liu grew up in a small village in rural Sichuan, China. After marrying Delian, they migrated to Anren- a national key town 25 miles from the city of Chengdu- where they found work and lodging managing a convenience store. They have one daughter, and much of their resources are devoted to providing for...
Topics: Sichuan, China, globallivesproject, Global Lives Project, glp, globallives
28
28
Jul 19, 2012
07/12
by
Global Lives Project
movies
eye 28
favorite 0
comment 0
This is part of a 24-hour recording of a day in the life of Kai Lui, a cafeteria food purchaser and convenience store manager from Anren, China. He was 37 years old at the time of the shoot. Kai Liu grew up in a small village in rural Sichuan, China. After marrying Delian, they migrated to Anren- a national key town 25 miles from the city of Chengdu- where they found work and lodging managing a convenience store. They have one daughter, and much of their resources are devoted to providing for...
Topics: Sichuan, China, globallivesproject, Global Lives Project, glp, globallives
91
91
Jul 20, 2013
07/13
by
Leonardo T. Rolla; Augusto Q. Teixeira
texts
eye 91
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In this note we investigate the last passage percolation model in the presence of macroscopic inhomogeneity. We analyze how this affects the scaling limit of the passage time, leading to a variational problem that provides an ODE for the deterministic limiting shape of the maximal path. We obtain a sufficient analytical condition for uniqueness of the solution for the variational problem. Consequences for the totally asymmetric simple exclusion process are discussed.
Source: http://arxiv.org/abs/0804.1810v1
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66
Jul 20, 2013
07/13
by
Carl Bracken; Eimear Byrne; Nadya Markin; Gary McGuire
texts
eye 66
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comment 0
We present two infinite families of APN functions where the degree of the field is divisible by 3 but not 9. Our families contain two already known families as special cases. We also discuss the inequivalence proof (by computation) which shows that these functions are new.
Source: http://arxiv.org/abs/0804.4799v1
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51
Jul 20, 2013
07/13
by
S. R. Nelatury; J. A. Polo Jr.; A. Lakhtakia
texts
eye 51
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comment 0
The propagation of Dyakonov surface waves (DSWs) at the planar interface between an isotropic material and a linear electro-optic birefringent material can be dynamically controlled using the Pockels effect. The range of directions for DSW propagation has been previously found to be rather narrow. By careful choice of various parameters, this range of directions can be increased by more than an order of magnitude.
Source: http://arxiv.org/abs/0804.4879v1
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69
May 10, 2011
05/11
by
Everett, Anna, 1954-
texts
eye 69
favorite 0
comment 0
An exploration of how issues of race and ethnicity play out in a digital media landscape that includes MySpace, post-9/11 politics, MMOGs, Internet music distribution, and the digital divide.
Topics: technology, education, Race relations, Ethnic relations, Internet and teenagers, Internet,...
Source: removedNEL
Tommy Gregg (left), Helen Maffei, and Tim McConnell. Dave Bridgwater retirement party. Portland, Oregon. Photo by: Julie Johnson Date: February 2, 2008 Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection. Source: Aerial Survey Program collection. Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
Topics: davebridgwaterretirement, foresthealthprotection, february22008, usda, stateandprivateforestry,...
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126
Jul 20, 2013
07/13
by
Richard Lieu
texts
eye 126
favorite 0
comment 0
In any Big Bang cosmology, the frequency $\omega$ of light detected from a distant source is continuously and linearly changing (usually redshifting) with elapsed observer's time $\delta t$, because of the expanding Universe. For small $\delta t$, however, the resulting $\delta\omega$ shift lies beneath the Heisenberg frequency uncertainty. And since there {\it is} a way of telling whether such short term shifts really exist, if the answer is affirmative we will have a means of monitoring...
Source: http://arxiv.org/abs/0804.0227v3
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160
Jul 20, 2013
07/13
by
Maulik K. Parikh; Jan Pieter van der Schaar
texts
eye 160
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We formulate the information paradox in de Sitter space in terms of the no-cloning principle of quantum mechanics. We show that energy conservation puts an upper bound on the maximum entropy available to any de Sitter observer. Combined with a general result on the average information in a quantum subsystem, this guarantees that an observer in de Sitter space cannot obtain even a single bit of information from the de Sitter horizon, thereby preventing any observable violations of the quantum...
Source: http://arxiv.org/abs/0804.0231v2
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46
Jul 20, 2013
07/13
by
R. Monaco; M. Aaroe; V. P. Koshelets; J. Mygind
texts
eye 46
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The magnetic field distribution in the barrier of small planar Josephson tunnel junctions is numerically simulated in the case when an external magnetic field is applied perpendicular to the barrier plane. The simulations allow for heuristic analytical solutions for the Josephson static phase profile from which the dependence of the maximum Josephson current on the applied field amplitude is derived. The most common geometrical configurations are considered and, when possible, the theoretical...
Source: http://arxiv.org/abs/0804.1057v1
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174
Jul 20, 2013
07/13
by
Hirbod Assa
texts
eye 174
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comment 0
In this brief article we characterize the relatively compact subsets of $\mathcal{A}^p$ for the topology $\sigma(\mathcal{A}^p,\mathcal{R}^q)$ (see below), by the weak compact subsets of $L^p$ . The spaces $\mathcal{R}^q$ endowed with the weak topology induced by $\mathcal{A}^p$, was recently employed to create the convex risk theory of random processes. The weak compact sets of $\mathcal{A}^p$ are important to characterize the so-called Lebesgue property of convex risk measures, to give a...
Source: http://arxiv.org/abs/0804.2873v1
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130
Aug 26, 2011
08/11
by
Sakaguchi,Ango 坂口,安吾 (1906-1955)
texts
eye 130
favorite 0
comment 0
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55
Jul 22, 2013
07/13
by
Vladimir Markovic; Dragomir Saric
texts
eye 55
favorite 0
comment 0
Let $M$ be a closed surface. By $\Homeo(M)$ we denote the group of orientation preserving homeomorphisms of $M$ and let $\MC(M)$ denote the Mapping class group. In this paper we complete the proof of the conjecture of Thurston that says that for any closed surface $M$ of genus $\g \ge 2$, there is no homomorphic section $\E:\MC(M) \to \Homeo(M)$ of the standard projection map $\Proj:\Homeo(M) \to \MC(M)$.
Source: http://arxiv.org/abs/0807.0182v1
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130
Jul 22, 2013
07/13
by
Hoang Ahn Tuan Kiet; Seung Ki Baek; Hawoong Jeong; Beom Jun Kim
texts
eye 130
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comment 0
We empirically study the genealogical trees of ten families for about five centuries in Korea. Although each family tree contains only the paternal part, the family names of women married to the family have been recorded, which allows us to estimate roughly the family name distributions for the past five hundred years. Revealed is the fact that the unique Korean family name distribution, characterized by a logarithmic form of the cumulative distribution and an exponentially decaying rank-size...
Source: http://arxiv.org/abs/0807.2082v1
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63
Jul 22, 2013
07/13
by
Dragos Ghioca; Thomas J. Tucker; Michael E. Zieve
texts
eye 63
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comment 0
We study the orbits of a polynomial f in C[X], namely the sets {e,f(e),f(f(e)),...} with e in C. We prove that if nonlinear complex polynomials f and g have orbits with infinite intersection, then f and g have a common iterate. More generally, we describe the intersection of any line in C^d with a d-tuple of orbits of nonlinear polynomials, and we formulate a question which generalizes both this result and the Mordell--Lang conjecture.
Source: http://arxiv.org/abs/0807.3576v1
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150
Jul 22, 2013
07/13
by
Julien Diaz; Abdelaâziz Ezziani
texts
eye 150
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comment 0
We are interested in the modeling of wave propagation in poroelastic media. We consider the biphasic Biot's model in an infinite bilayered medium with a plane interface. We adopt the Cagniard-De Hoop's technique. This report is devoted to the calculation of analytical solution in three dimension.
Source: http://arxiv.org/abs/0807.4067v1
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Jul 22, 2013
07/13
by
Yuta Kodama; Kento Kokubu; Nobuyuki Sawado
texts
eye 140
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comment 0
We construct brane solutions in six dimensional Einstein-Skyrme systems. A class of baby skyrmion solutions realize warped compactification of the extra dimensions and gravity localization on the brane for negative bulk cosmological constant. Coupling of the fermions with the brane skyrmions successfully lead to the brane localized fermions. The standard representation of the gamma matrices is used to obtain massive localized modes as well as the massless one. Nonlinear nature of the skyrmions...
Source: http://arxiv.org/abs/0807.4060v1
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88
Nov 14, 2013
11/13
by
Abhinav Kumar
texts
eye 88
favorite 0
comment 0
Topics: Maths, Linear Algebra and Geometry, Algebraic Geometry, Mathematics
Source: http://www.flooved.com/reader/2206
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101
Nov 14, 2013
11/13
by
Abhinav Kumar
texts
eye 101
favorite 0
comment 0
Topics: Maths, Linear Algebra and Geometry, Algebraic Geometry, Mathematics
Source: http://www.flooved.com/reader/2207
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811
Oct 20, 2010
10/10
by
Alex Smith
audio
eye 811
favorite 0
comment 0
Andreas Schmittner is Assistant Professor at the College of Oceanic and Atmospheric Sciences at Oregon State University. In this Radio Ecoshock interview, he has deep concern about rapid climate change, especially looking at new date about the ocean / atmosphere relationship. From Ecoshock 2008 0912
Topics: radio, radio ecoshock, environment, green, climate08, ecology, climate, climate change, global...
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22
May 27, 2021
05/21
by
Xuhui Fan
texts
eye 22
favorite 0
comment 0
The main purpose of this paper is using the elementary methods to study the mean value properties of the Pseudo-Smarandache-Squarefree function and Smarandache function, and give two sharper asymptotic formulas for it.
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93
Aug 26, 2011
08/11
by
Miyamoto,Yuriko 宮本,百合子 (1899-1951)
texts
eye 93
favorite 0
comment 0
131
131
Aug 26, 2011
08/11
by
Ishikawa,Takuboku 石川,啄木 (1886-1912)
texts
eye 131
favorite 0
comment 0
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104
Aug 26, 2011
08/11
by
Sakaguchi,Ango 坂口,安吾 (1906-1955)
texts
eye 104
favorite 0
comment 0
62
62
Jul 22, 2013
07/13
by
Chinh T. Hoang
texts
eye 62
favorite 0
comment 0
The sun is the graph obtained from a cycle of length even and at least six by adding edges to make the even-indexed vertices pairwise adjacent. Suns play an important role in the study of strongly chordal graphs. A graph is chordal if it does not contain an induced cycle of length at least four. A graph is strongly chordal if it is chordal and every even cycle has a chord joining vertices whose distance on the cycle is odd. Farber proved that a graph is strongly chordal if and only if it is...
Source: http://arxiv.org/abs/0807.0462v1
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138
Jul 22, 2013
07/13
by
Nikolay Gromov; Pedro Vieira
texts
eye 138
favorite 0
comment 0
We present the OSp(2,2|6) symmetric algebraic curve for the AdS4/CFT3 duality recently proposed in arXiv:0806.1218. It encodes all classical string solutions at strong t'Hooft coupling and the full two loop spectrum of long single trace gauge invariant operators in the weak coupling regime. This construction can also be used to compute the complete superstring semi-classical spectrum around any classical solution. We exemplify our method on the BMN point-like string.
Source: http://arxiv.org/abs/0807.0437v2
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113
Jul 22, 2013
07/13
by
Frank Klein et al.
texts
eye 113
favorite 0
comment 0
The photoproduction of omega mesons off protons has been studied at the Bonn ELSA accelerator from threshold to E_gamma = 1700 MeV. Linearly polarized beams were produced via coherent bremsstrahlung. Large photon asymmtries in excess of 50% were obtained, whereas the pion asymmetries from omega \to pi^0 gamma are close to zero. The asymmetries do characteristically depend on Theta_{cm} rather than |t| and indicate s-channel resonance formation on top of t-channel exchange processes.
Source: http://arxiv.org/abs/0807.0594v1
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73
Jul 22, 2013
07/13
by
Thomas Peternell
texts
eye 73
favorite 0
comment 0
We study the geometry of projective manifolds whose tangent bundles are nef on sufficiently general curves (i.e. the tangent bundle is generically nef) and show that manifolds whose anticanonical bundles are semi-ample have this property. Furthermore we introduce a notion of sufficient nefness and investigate the relation with manifolds whose anticanonical bundles are nef.
Source: http://arxiv.org/abs/0807.0982v1
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69
Jul 22, 2013
07/13
by
R. Ciftci; A. K. Ciftci; S. Sultansoy
texts
eye 69
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comment 0
We investigate the impact of the fourth generation quarks on production and decays of the charged Higgs boson at CERN Large Hadron Collider (LHC) with triple $b$-tagging. The signal is the process $gg\to \bar{u_4}u_4$, followed by $\bar{u_4}\to W^{-} \bar{b}$ and $u_4\to h^{+} b$ decays with subsequent $h^{+}\to t \bar{b}$ and corresponding hermitic conjugates. It is shown that, if $m_{u_{4}}= 400$ GeV, considered process will provide unique opportunity to discover charged Higgs boson with mass...
Source: http://arxiv.org/abs/0807.0831v1
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99
Jul 22, 2013
07/13
by
Julie Gayon; Francesco Marzari; Hans Scholl
texts
eye 99
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The five planets discovered around the main-sequence star 55 Cnc may represent a case of stable chaos. By using both the Frequency Map Analysis and MEGNO we find that about 15 % of the systems that can be build from the nominal orbital elements of the system are highly chaotic. However, in spite of the fast diffusion rate in the phase space, the planetary system is not destabilized over 400 Myr and close encounters between the planets are avoided.
Source: http://arxiv.org/abs/0807.1235v1
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50
Jul 22, 2013
07/13
by
Carles Casacuberta; Amnon Neeman
texts
eye 50
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We exhibit a triangulated category T having both products and coproducts, and a triangulated subcategory S of T which is both localizing and colocalizing, for which neither a Bousfield localization nor a colocalization exists. It follows that neither the category S nor its dual satisfy Brown representability. Our example involves an abelian category whose derived category does not have small Hom-sets.
Source: http://arxiv.org/abs/0807.1872v1
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62
Jul 22, 2013
07/13
by
A. I. Titov; B. Kampfer
texts
eye 62
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We discuss the open charm production in peripheral reactions $\bar pp\to \bar Y_cY_c$ and $\bar pp\to M_c\bar M_c$, where $Y_c$ and $M_c$ stand for $\Lambda_c^+,\Sigma_c^+$ and $D,D^*$, respectively, at $\sqrt{s}\lesssim 15$ GeV, which corresponds to the energy range of FAIR. Our consideration is based on the topological decomposition of the planar quark and diquark diagrams which allows to estimate consistently meson and baryon exchange trajectories and energy scale parameters as well. The...
Source: http://arxiv.org/abs/0807.1822v1
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87
Jul 22, 2013
07/13
by
V. Bhardwaj; R. Kumar; J. B. Singh; for the Belle Collaboration
texts
eye 87
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We report the first observation of $B^{\pm}\to\psi(2S)\pi^{\pm}$, a Cabibbo- and color-suppressed decay. This analysis is based on $657\times10^{6}$ $B\overline B$ events collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB energy-asymmetric $e^+e^-$ collider. The measured branching fraction is ($2.44 \pm 0.22 \pm 0.20$)$\times 10^{-5}$ and the charge asymmetry is $\mathcal{A}=0.022 \pm 0.085 \pm 0.016$. The ratio of the branching fractions $\mathcal {B}(B^{\pm} \to...
Source: http://arxiv.org/abs/0807.2170v2
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88
Jul 22, 2013
07/13
by
J. Santos; M. J. Reboucas; J. S. Alcaniz
texts
eye 88
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comment 0
We present and discuss the bounds from the energy conditions on a general f(R) functional form in the framework of metric variational approach. As a concrete application of the energy conditions to locally homogeneous and isotropic f(R)-cosmology, the recent estimated values of the deceleration and jerk parameters are used to examine the bounds from the weak energy condition on the free parameter of the family of f(R)=\sqrt{R^2 - R_0^2} gravity theory.
Source: http://arxiv.org/abs/0807.2443v2
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153
Jul 22, 2013
07/13
by
Matthias Burkardt
texts
eye 153
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We summarize the intuitive connection between deformations of parton distributions in impact parameter space and single-spin asymmetries. Lattice results for the $x^2$-moment of the twist-3 polarized parton distribution $g_2(x)$ are used to estimate the average transverse force acting on the active quark in SIDIS in the instant after being struck by the virtual photon.
Source: http://arxiv.org/abs/0807.2599v1
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171
Jul 22, 2013
07/13
by
Victor Taveras
texts
eye 171
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In loop quantum cosmology the quantum dynamics is well understood. We approximate the full quantum dynamics in the infinite dimensional Hilbert space by projecting it on a finite dimensional submanifold thereof, spanned by suitably chosen semiclassical states. This submanifold is isomorphic with the classical phase space and the projected dynamical flow provides effective equations incorporating the leading quantum corrections to the classical equations of motion. Numerical work has been done...
Source: http://arxiv.org/abs/0807.3325v2
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Jul 22, 2013
07/13
by
Fabien Durand
texts
eye 56
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comment 0
If a non-periodic sequence $X$ is the image by a morphism of a fixed point of both a primitive substitution $\sigma$ and a primitive substitution $\tau$, then the dominant eigenvalues of the matrices of $\sigma$ and of $\tau$ are multiplicatively dependent. This is the way we propose to generalize Cobham's Theorem.
Source: http://arxiv.org/abs/0807.3406v1
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69
Jul 22, 2013
07/13
by
A. D. Christianson; M. D. Lumsden; O. Delaire; M. B. Stone; D. L. Abernathy; M. A. McGuire; A. S. Sefat; R. Jin; B. C. Sales; D. Mandrus; E. D. Mun; P. C. Canfield; J. Y. Y. Lin; M. Lucas; M. Kresch; J. B. Keith; B. Fultz; E. A. Goremychkin; R. J. McQueeney
texts
eye 69
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We have studied the phonon density of states (PDOS) in LaFeAsO1-xFx with inelastic neutron scattering methods. The PDOS of the parent compound(x=0) is very similar to the PDOS of samples optimally doped with fluorine to achieve the maximum Tc (x~0.1). Good agreement is found between the experimental PDOS and first-principle calculations with the exception of a small difference in Fe mode frequencies. The PDOS reported here is not consistent with conventional electron-phonon mediated...
Source: http://arxiv.org/abs/0807.3370v1
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Jul 22, 2013
07/13
by
D. A. Sokolov; M. C. Aronson; R. Erwin; J. W. Lynn; M. D. Lumsden; S. E. Nagler
texts
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Neutron diffraction measurements on single crystals of Cr1-xVx (x=0, 0.02, 0.037) show that the ordering moment and the Neel temperature are continuously suppressed as x approaches 0.037, a proposed Quantum Critical Point (QCP). The wave vector Q of the spin density wave (SDW) becomes more incommensurate as x increases in accordance with the two band model. At xc=0.037 we have found temperature dependent, resolution limited elastic scattering at 4 incommensurate wave vectors Q=(1+/-delta_1,2,...
Source: http://arxiv.org/abs/0807.3586v2
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101
Jul 22, 2013
07/13
by
A. Orsi; C. G. Lacey; C. M. Baugh; L. Infante
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We combine a semi-analytical model of galaxy formation with a very large simulation which follows the growth of large scale structure in a LambdaCDM universe to predict the clustering of Ly-alpha emitters. We find that the clustering strength of Ly-alpha emitters has only a weak dependence on Ly-alpha luminosity but a strong dependence on redshift. With increasing redshift, Ly-alpha emitters trace progressively rarer, higher density regions of the universe. Due to the large volume of the...
Source: http://arxiv.org/abs/0807.3447v4
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87
Jul 22, 2013
07/13
by
K. Hasegawa; S. Moch; P. Uwer
texts
eye 87
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We report on automating the Catani-Seymour dipole subtraction which is a general procedure to treat infrared divergences in real emission processes at next-to-leading order in QCD. The automatization rests on three essential steps: the creation of the dipole terms, the calculation of the color linked squared Born matrix elements, and the evaluation of different helicity amplitudes. The routines have been tested for a number of complex processes, such as the real emission process gg --> t...
Source: http://arxiv.org/abs/0807.3701v1
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89
Jul 22, 2013
07/13
by
D. A. Burton; A. Noble
texts
eye 89
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We develop a method for investigating the relationship between the shape of a 1-particle distribution and non-linear electrostatic oscillations in a collisionless plasma, incorporating transverse thermal motion. A general expression is found for the maximum sustainable electric field, and is evaluated for a particular highly anisotropic distribution.
Source: http://arxiv.org/abs/0807.3700v2
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100
Jul 22, 2013
07/13
by
Kenichi Bannai; Shinichi Kobayashi
texts
eye 100
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In this paper, we give a proof of the classical Kronecker limit formulas using the distribution relation of the Eisenstein-Kronecker series. Using a similar idea, we then prove $p$-adic analogues of the Kronecker limit formulas for the $p$-adic Eisenstein-Kronecker functions defined in our previous paper.
Source: http://arxiv.org/abs/0807.4008v1
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125
Jul 22, 2013
07/13
by
M. Journée; F. Bach; P. -A. Absil; R. Sepulchre
texts
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We propose an algorithm for solving nonlinear convex programs defined in terms of a symmetric positive semidefinite matrix variable $X$. This algorithm rests on the factorization $X=Y Y^T$, where the number of columns of Y fixes the rank of $X$. It is thus very effective for solving programs that have a low rank solution. The factorization $X=Y Y^T$ evokes a reformulation of the original problem as an optimization on a particular quotient manifold. The present paper discusses the geometry of...
Source: http://arxiv.org/abs/0807.4423v1
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184
Jul 22, 2013
07/13
by
Shaun Ault
texts
eye 184
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Symmetric homology is an analog of cyclic homology in which the cyclic groups are replaced by symmetric groups. The foundations for the theory of symmetric homology of algebras are developed in the context of crossed simplicial groups using derived functors and the symmetric bar construction of Fiedorowicz. The symmetric homology of group rings is related to stable homotopy theory. Two chain complexes are constructed that compute symmetric homology, as well as two spectral sequences. In the...
Source: http://arxiv.org/abs/0807.4521v1
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80
Jul 22, 2013
07/13
by
T. Charters; A. Nunes; J. P. Mimoso
texts
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We address the problem of studying the decay of the inflaton field $\phi$ to another scalar field $\chi$ through parametric resonance in the case of a coupling that involves several decay modes. This amounts to the presence of extra harmonic terms in the perturbation of the $\chi$ field dynamics. For the case of two frequencies we compute the geometry of the resonance regions, which is significantly altered due to the presence of non-cuspidal resonance regions associated to higher harmonics and...
Source: http://arxiv.org/abs/0807.4805v2
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44
Jul 22, 2013
07/13
by
Rolf Berndt
texts
eye 44
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There is a huge amount of work on different kinds of theta functions, the theta correspondence, cohomology classes coming from special Schwartz classes via theta distribution, and much more. The aim of this text is to try to find joint construction principles while often leaving aside relevant but cumbersome details.
Source: http://arxiv.org/abs/0807.4654v1
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59
Jul 22, 2013
07/13
by
Mihai N. Pascu; Maria E. Gageonea
texts
eye 59
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A well known conjecture of R. Laugesen and C. Morpurgo asserts that the diagonal element of the Neumann heat kernel of the unit ball in $\mathbb{R}^{n}$ ($n\geq1$) is a radially increasing function. In this paper, we use probabilistic arguments to settle this conjecture, and, as an application, we derive a new proof of the Hot Spots conjecture of J. Rauch in the case of the unit disk.
Source: http://arxiv.org/abs/0807.4726v2
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48
Jul 20, 2013
07/13
by
S. -Y. Wang
texts
eye 48
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A comment on the paper "Truncated Schwinger-Dyson Equations and Gauge Covariance in QED3", Few-Body Syst. 41, 185 (2007) [hep-ph/0511291].
Source: http://arxiv.org/abs/hep-ph/0604186v3
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31
Jul 19, 2012
07/12
by
Global Lives Project
movies
eye 31
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This is part of a 24-hour recording of a day in the life of Dadah, a farmer from Sarimukti Village, Indonesia. She was 32 years old at the time of the shoot. Dadah is a mother of three from Sarimukti, a Sundanese village in the highlands of West Java. She and her husband are farm workers on a state-owned plantation that dates back to Dutch colonial days. They are practicing Muslims and active members of the Pasundan Farmers' Union, which lobbies for both land re-distribution among farmers and...
Topics: Sarimukti Village, Jakarta, Indonesia, globallivesproject, Global Lives Project, glp, globallives
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32
Jul 19, 2012
07/12
by
Global Lives Project
movies
eye 32
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This is part of a 24-hour recording of a day in the life of Kai Lui, a cafeteria food purchaser and convenience store manager from Anren, China. He was 37 years old at the time of the shoot. Kai Liu grew up in a small village in rural Sichuan, China. After marrying Delian, they migrated to Anren- a national key town 25 miles from the city of Chengdu- where they found work and lodging managing a convenience store. They have one daughter, and much of their resources are devoted to providing for...
Topics: Sichuan, China, globallivesproject, Global Lives Project, glp, globallives
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40
Jul 19, 2012
07/12
by
Global Lives Project
movies
eye 40
favorite 0
comment 0
This is part of a 24-hour recording of a day in the life of Kai Lui, a cafeteria food purchaser and convenience store manager from Anren, China. He was 37 years old at the time of the shoot. Kai Liu grew up in a small village in rural Sichuan, China. After marrying Delian, they migrated to Anren- a national key town 25 miles from the city of Chengdu- where they found work and lodging managing a convenience store. They have one daughter, and much of their resources are devoted to providing for...
Topics: Sichuan, China, globallivesproject, Global Lives Project, glp, globallives
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108
Nov 20, 2010
11/10
by
Alex Smith
audio
eye 108
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Afghanistan: Pipeline In A Troubled Land / Foster, John / 080916 / Vancouver, Canada / Maritime Labour Centre / Recorded by Alex Smith The real reason NATO and the Americans are there? Is this a war about oil delivery?
Topics: radio, radio ecoshock, brownbagger, speech, Afghanistan, oil, pipeline, politics, war, military,...
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15
Dec 31, 2021
12/21
by
Xinde Li; Xianzhong Dai; Jean Dezert; Florentin Smarandache
texts
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Most of modern systems for information retrieval, fusion and management have to deal more and more with information expressed quatitatively (by linguistic labels) since human reports are better and easier expressed in natural language than with numbers. In this paper, we propose to use Herrera-Mart´ınez’ 2-Tuple linguistic representation model (i.e. equidistant linguistic labels with a numeric value assessment) for reasoning with uncertain and qualitative information in Dezert-Smarandache...
2,370
2.4K
Nov 8, 2010
11/10
by
Alex Smith
audio
eye 2,370
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Interview with UK columnist/author George Monbiot. And coverage of extreme rainfall events around the world, plus the possibility of violent climate reaction as the public realizes our situation.. Are we going to let this happen? Radio Ecoshock Show 080905 1 hour CD quality 56 MB or Lo-Fi 14 MB Visit Radio Ecoshock
Topics: radio, radio ecoshock, show, 2008, environment, ecology, green, climate, climate change, global...
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156
Jul 20, 2013
07/13
by
D. Maslov; G. W. Dueck; D. M. Miller; C. Negrevergne
texts
eye 156
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Quantum circuits are time dependent diagrams describing the process of quantum computation. Usually, a quantum algorithm must be mapped into a quantum circuit. Optimal synthesis of quantum circuits is intractable and heuristic methods must be employed. With the use of heuristics, the optimality of circuits is no longer guaranteed. In this paper, we consider a local optimization technique based on templates to simplify and reduce the depth of non-optimal quantum circuits. We present and analyze...
Source: http://arxiv.org/abs/quant-ph/0604001v2
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145
Jul 20, 2013
07/13
by
David Eppstein
texts
eye 145
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We provide efficient constant factor approximation algorithms for the problems of finding a hierarchical clustering of a point set in any metric space, minimizing the sum of minimimum spanning tree lengths within each cluster, and in the hyperbolic or Euclidean planes, minimizing the sum of cluster perimeters. Our algorithms for the hyperbolic and Euclidean planes can also be used to provide a pants decomposition, that is, a set of disjoint simple closed curves partitioning the plane minus the...
Source: http://arxiv.org/abs/cs/0604034v2
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145
Jul 22, 2013
07/13
by
D. L. Wang; X. H. Yan; W. M. Liu
texts
eye 145
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We develop a systematic analytical approach to study the linear and nonlinear solitary excitations of quasi-one-dimensional Bose-Einstein condensates trapped in an optical lattice. For the linear case, the Bloch wave in the $nth$ energy band is a linear superposition of Mathieu's functions $ce_{n-1}$ and $se_n$; and the Bloch wave in the $nth$ band gap is a linear superposition of $ce_n$ and $se_n$. For the nonlinear case, only solitons inside the band gaps are likely to be generated and there...
Source: http://arxiv.org/abs/0807.3989v1
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133
Jul 20, 2013
07/13
by
P. Manimaran; Prasanta K. Panigrahi; Jitendra C. Parikh
texts
eye 133
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We study the scaling behavior of the fluctuations, as extracted through wavelet coefficients based on discrete wavelets. The analysis is carried out on a variety of physical data sets, as well as Gaussian white noise and binomial multi-fractal model time series and the results are compared with continuous wavelet based average wavelet coefficient method. It is found that high-pass coefficients of wavelets, belonging to the Daubechies family are quite good in estimating the true power in the...
Source: http://arxiv.org/abs/physics/0604004v2
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88
Jul 22, 2013
07/13
by
Yasufumi Hashimoto
texts
eye 88
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Sarnak obtained the asymptotic formula of the sum of the class numbers of indefinite binary quadratic forms from the prime geodesic theorem for the modular group. In the present paper, we show several asymptotic formulas of partial sums of the class numbers by using the prime geodesic theorems for the congruence subgroups of the modular group.
Source: http://arxiv.org/abs/0807.0056v1
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54
Jul 22, 2013
07/13
by
Ye. S. Avotina; Yu. A. Kolesnichenko; J. M. van Ruitenbeek
texts
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We have investigated theoretically the conductance of a Normal-Superconductor point-contact in the tunnel limit and analyzed the quantum interference effects originating from the scattering of quasiparticles by point-like defects. Analytical expressions for the oscillatory dependence of the conductance on the position of the defect are obtained for the defect situated either in the normal metal, or in the superconductor. It is found that the amplitude of oscillations significantly increases...
Source: http://arxiv.org/abs/0807.0310v1
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58
Jul 22, 2013
07/13
by
Andrew Youdin
texts
eye 58
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This pedagogical review covers an unsolved problem in the theory of protoplanetary disks: the growth of dust grains into planetesimals, solids at least a kilometer in size. I summarize timescale constraints imposed on planetesimal formation by circumstellar disk observations, analysis of meteorites, and aerodynamic radial migration. The infall of ~meter-sized solids in a hundred years is the most stringent constraint. I review proposed mechanisms for planetesimal formation. Collisional...
Source: http://arxiv.org/abs/0807.1114v2
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56
Jul 22, 2013
07/13
by
Richard J. Gonsalves
texts
eye 56
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Selected applications of perturbative Quantumchromodynamics (QCD) to predictions of the Standard Model for processes at high energy colliders are reviewed with emphasis on past successes and future problems. This is a personal retrospective is not intended to be a comprehensive review of the field.
Source: http://arxiv.org/abs/0807.0828v3
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122
Jul 22, 2013
07/13
by
David Harvey
texts
eye 122
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We describe an algorithm for computing Bernoulli numbers. Using a parallel implementation, we have computed B(k) for k = 10^8, a new record. Our method is to compute B(k) modulo p for many small primes p, and then reconstruct B(k) via the Chinese Remainder Theorem. The asymptotic time complexity is O(k^2 log(k)^(2+epsilon)), matching that of existing algorithms that exploit the relationship between B(k) and the Riemann zeta function. Our implementation is significantly faster than several...
Source: http://arxiv.org/abs/0807.1347v2
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52
Jul 22, 2013
07/13
by
A. Yu. Voronin; P. Froelich
texts
eye 52
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We present a treatment of cold hydrogen-antihydrogen collisions based on the asymptotic properties of atom-antiatom interactions. We derive general formulas for the elastic and inelastic cross sections and for the scattering lengths and analyze their sensitivity to the parameters characterizing the inelasticity of the collision process. Given the inelasticity, we obtain bounds for the complex scattering length. We investigate the influence of strong nuclear forces and the isotope effects in...
Source: http://arxiv.org/abs/0807.2042v1
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165
Jul 22, 2013
07/13
by
P. Aniello; G. Marmo; G. F. Volkert
texts
eye 165
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The embedding of a manifold M into a Hilbert-space H induces, via the pull-back, a tensor field on M out of the Hermitian tensor on H. We propose a general procedure to compute these tensors in particular for manifolds admitting a Lie-group structure.
Source: http://arxiv.org/abs/0807.2161v2
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96
Jul 22, 2013
07/13
by
Enrico Conti; F. C. MacKintosh
texts
eye 96
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Motivated by recent experiments showing that stiff biopolymer gels exhibit highly unusual negative normal elastic stresses, we develop a computational model for stiff polymer networks subject to large strains. In all cases, we find that such networks develop normal stresses that are both negative and of magnitude comparable to the corresponding shear stress. We find that these normal stresses coincide with other nonlinearities in our networks, and specifically with compressive bucking of the...
Source: http://arxiv.org/abs/0807.1935v1
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51
Jul 22, 2013
07/13
by
G. A. Doschek; H. P. Warren; J. T. Mariska; K. Muglach; J. L. Culhane; H. Hara; T Watanabe
texts
eye 51
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From Doppler velocity maps of active regions constructed from spectra obtained by the Extreme-ultraviolet Imaging Spectrometer (EIS) on the Hinode spacecraft we observe large areas of outflow (20-50 km/s) that can persist for at least a day. These outflows occur in areas of active regions that are faint in coronal spectral lines formed at typical quiet Sun and active region temperatures. The outflows are positively correlated with non-thermal velocities in coronal plasmas. The bulk mass motions...
Source: http://arxiv.org/abs/0807.2860v1
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51
Jul 22, 2013
07/13
by
Shaghik Atakaramians; Shahraam Afshar V.; Bernd M. Fischer; Derek Abbott; Tanya M. Monro
texts
eye 51
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We demonstrate that porous fibers have low effective material loss over an extended frequency range, 4.5 times larger bandwidth than that can be achieved in sub-wavelength solid core fibers. We also show that these new fibers can be designed to have near zero dispersion for 0.5-1 THz resulting to overall less terahertz signal degradation. In addition, it is demonstrated that the use of asymmetrical sub-wavelength air-holes within the core leads to high birefringence ~0.026. This opens up the...
Source: http://arxiv.org/abs/0807.4354v1
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105
Jul 20, 2013
07/13
by
Claude Pache
texts
eye 105
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A well known theorem of Voronoi caracterizes extreme quadratic forms and Euclidean lattices, that is those which are local maxima for the Hermite function, as perfect and eutactic. This caracterization has been extended in various cases, such that family of lattices, sections of lattices, Humbert forms, etc. Moreover, there is a criterion for extreme lattices, discovered by Venkov, formulated in terms of spherical designs which has been extended in the case of Grassmannians and sections of...
Source: http://arxiv.org/abs/0804.0173v2
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187
Jul 20, 2013
07/13
by
Tsunehiko N. Kato; Hideaki Takabe
texts
eye 187
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We show that the Weibel-mediated collisionless shocks are driven at non-relativistic propagation speed (0.1c < V < 0.45c) in unmagnetized electron-ion plasmas by performing two-dimensional particle-in-cell simulations. It is shown that the profiles of the number density and the mean velocity in the vicinity of the shock transition region, which are normalized by the respective upstream values, are almost independent of the upstream bulk velocity, i.e., the shock velocity. In particular,...
Source: http://arxiv.org/abs/0804.0052v2
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76
Jul 20, 2013
07/13
by
H. -R. Müller; V. Florinski; J. Heerikhuisen; V. V. Izmodenov; K. Scherer; D. Alexashov; H. -J. Fahr
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eye 76
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Modeling of the global heliosphere seeks to investigate the interaction of the solar wind with the partially ionized local interstellar medium. Models that treat neutral hydrogen self-consistently and in great detail, together with the plasma, but that neglect magnetic fields, constitute a sub-category within global heliospheric models. There are several different modeling strategies used for this sub-category in the literature. Differences and commonalities in the modeling results from...
Source: http://arxiv.org/abs/0804.0125v1
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53
Jul 20, 2013
07/13
by
Fabrizio Dolcini; Luca Dell'Anna
texts
eye 53
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We study the out-of-equilibrium current through a multilevel quantum dot contacted to two superconducting leads and in the presence of Rashba and Dresselhaus spin-orbit couplings, in the regime of strong dot-lead coupling. The multiple Andreev reflection (MAR) subgap peaks in the current voltage characteristics are found to be modified (but not suppressed) by the spin-orbit interaction, in a way that strongly depends on the shape of the dot confining potential. In a perfectly isotropic dot the...
Source: http://arxiv.org/abs/0804.0591v2
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233
Jul 20, 2013
07/13
by
Jaspreet Singh; Onkar Dabeer; Upamanyu Madhow
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eye 233
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Modern communication receiver architectures center around digital signal processing (DSP), with the bulk of the receiver processing being performed on digital signals obtained after analog-to-digital conversion (ADC). In this paper, we explore Shannon-theoretic performance limits when ADC precision is drastically reduced, from typical values of 8-12 bits used in current communication transceivers, to 1-3 bits. The goal is to obtain insight on whether DSP-centric transceiver architectures are...
Source: http://arxiv.org/abs/0804.1172v1
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164
Jul 20, 2013
07/13
by
Elemer E. Rosinger
texts
eye 164
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The role of mathematical models in physics has for longer been well established. The issue of their proper building and use appears to be less clear. Examples in this regard from relativity and quantum mechanics are mentioned. Comments concerning a more appropriate way in setting up and using mathematical models in physics are presented.
Source: http://arxiv.org/abs/0804.0877v2
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57
Jul 20, 2013
07/13
by
Erasmo Recami
texts
eye 57
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This writing has been prepared on the occasion of the 75th birthday of E.C.George Sudarshan, who (besides the originator of the V-A theory for weak-forces, of quantum optics --the quantum representation of coherent light--, of dynamical maps for open quantum systems, of the Zeno effect, etc.) was a pioneer, already in the sisties, also of the theory of the so-called "tachyons". This paper wishes to be a homage to E.C.G.Sudarshan, in connection with the last-mentioned pioneering work...
Source: http://arxiv.org/abs/0804.1502v1
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64
Jul 20, 2013
07/13
by
Carlos Mora-Corral
texts
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In this paper we present two atomistic models for the energy of a one-dimensional elastic crystal. We assume that the macroscopic displacement equals the microscopic one. The energy of the first model is given by a two-body interaction potential, and we assume that the atoms follow a continuous and piecewise smooth macroscopic (continuum) deformation. We calculate the first terms of the Taylor expansion (with respect to the parameter representing the interatomic distance) of the atomistic...
Source: http://arxiv.org/abs/0804.1496v2
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95
Jul 20, 2013
07/13
by
J. de la Figuera; F. Leonard; R. Stumpf; N. C. Bartelt; K. F. McCarty
texts
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We observe using low-energy electron microscopy the self-assembly of monolayer-thick stripes of Au on W(110) near the transition temperature between stripes and the non-patterned (homogeneous) phase. We demonstrate that the amplitude of this Au stripe phase decreases with increasing temperature and vanishes at the order-disorder transition (ODT). The wavelength varies much more slowly with temperature and coverage than theories of stress-domain patterns with sharp phase boundaries would...
Source: http://arxiv.org/abs/0804.1273v1
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50
Jul 20, 2013
07/13
by
Leonid Galtchouk; Serguey Pergamenshchikov
texts
eye 50
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Asymptotic efficiency is proved for the constructed in part 1 procedure, i.e. Pinsker's constant is found in the asymptotic lower bound for the minimax quadratic risk. It is shown that the asymptotic minimax quadratic risk of the constructed procedure coincides with this constant.
Source: http://arxiv.org/abs/0804.1715v1
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130
Jul 20, 2013
07/13
by
Kosmas Kosmidis; Shlomo Havlin; Armin Bunde
texts
eye 130
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We study the effects of spatial constraints on the structural properties of networks embedded in one or two dimensional space. When nodes are embedded in space, they have a well defined Euclidean distance $r$ between any pair. We assume that nodes at distance $r$ have a link with probability $p(r) \sim r^{- \delta}$. We study the mean topological distance $l$ and the clustering coefficient $C$ of these networks and find that they both exhibit phase transitions for some critical value of the...
Source: http://arxiv.org/abs/0804.2575v1
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47
Jul 20, 2013
07/13
by
David E. Kaplan; Matthew D. Schwartz
texts
eye 47
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Using recently developed techniques for computing event shapes with Soft-Collinear Effective Theory, LEP event shape data is used to derive strong model-independent bounds on new colored particles. In the effective field theory computation, colored particles contribute in loops not only to the running of alpha_s but also to the running of hard, jet and soft functions. Moreover, the differential distribution in the effective theory explicitly probes many energy scales, so event shapes have...
Source: http://arxiv.org/abs/0804.2477v1
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71
Jul 20, 2013
07/13
by
Chang-shui Yu; X. X. Yi; He-shan Song; D. Mei
texts
eye 71
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We have proposed a simple scheme to entangle two distant qutrits trapped in separate optical cavities. The quantum information of each qutrit is skillfully encoded on the degenerate ground states of a pair of atoms, hence the entanglement between them is relatively stable against spontaneous emission. In Lamb-Dicke limits, it is not necessary to require coincidence detections, which will relax the conditions for the experimental realization. The scheme is robust against the inefficient...
Source: http://arxiv.org/abs/0804.2516v1
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175
Jul 20, 2013
07/13
by
Abraham Loeb
texts
eye 175
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The initial conditions of our Universe can be summarized on a single sheet of paper. Yet the Universe is full of complex structures today, such as stars, galaxies and groups of galaxies. In this review I describe the standard theoretical model for how complexity emerged from the simple initial state of the Universe at early cosmic times through the action of gravity. In order to test and inform the related theoretical calculations, large-aperture telescopes and arrays of radio antennae are...
Source: http://arxiv.org/abs/0804.2258v1
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170
Jul 20, 2013
07/13
by
P. Ubaidulla; A. Chockalingam
texts
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In this paper, we consider linear precoding with SINR constraints for the downlink of a multiuser MISO (multiple-input single-output) communication system in the presence of imperfect channel state information (CSI). The base station is equipped with multiple transmit antennas and each user terminal is equipped with a single receive antenna. We propose a robust design of linear precoder which transmits minimum power to provide the required SINR at the user terminals when the true channel state...
Source: http://arxiv.org/abs/0804.2808v1
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119
Jul 20, 2013
07/13
by
William Y. C. Chen; Sabrina X. M. Pang; Ellen X. Y. Qu; Richard P. Stanley
texts
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Using the bijection between partitions and vacillating tableaux, we establish a correspondence between pairs of noncrossing free Dyck paths of length $2n$ and noncrossing partitions of $[2n+1]$ with $n+1$ blocks. In terms of the number of up steps at odd positions, we find a characterization of Dyck paths constructed from pairs of noncrossing free Dyck paths by using the Labelle merging algorithm.
Source: http://arxiv.org/abs/0804.2930v2
