Enquanto isso, na Comunidade Moderada de Física…

Para os freqüentadores daqui que têm conta no Orkut, eu recomendo fortemente a Comunidade Moderada de Física. Ultimamente, tenho tido pouco tempo de postar por aqui porque tenho acabado envolvido com discussões longas por lá — vale a pena conferir.

• Variaveis Escondidas em Mecanica Quantica
• Problema de Física-Matemática
• @@@ Cantinho geek @@@
• SuperArquivo: SuperInteressante abre seu acervo…
• Blogs científicos e educacionais em português
• Grupo de estudos: ‘The Road to Reality’
• Renormalização

Diversão garantida!

[]’s!

The interesting bits of today…

• Mathematician, Two Physicists Share Crafoord Prize
• Why the h-index is little use

today’s fortune…

It gets late early out there.
– Yogi Berra

Calendar for today…

Jan 31 	Jackie Robinson born, 1919
Jan 31 	Hewlett-Packard founded, 1939
Jan 31 	"Ham" the chimpanzee soars into space aboard Mercury-Redstone 2, 1961
Jan 31 	Explorer I launched, 1958.  Van Allen Belt discovered
Jan 31 	Irving Langmuir, 1881, invented tungsten filament lamp
Feb  1 	First TV soap: Secret Storm, 1954
Feb  1 	Forces led by Khomeini take over Iran, 1979
Feb  1 	Space Shuttle Columbia (STS-107) disintegrates 15 minutes before landing
	killing Husband, McCool, Chawla, Clark, Ramon, Brown, and Anderson, 2003
Feb  1 	Chinese New Year Holiday (3 days) in Taiwan
Feb  1	Parashat Mishpatim
Feb  1	Shabbat Mevarekhim
Jan 31 	Franz Schubert is born in Lichtenthal, Vienna, Austria, 1797
Jan 31 	The Grateful Dead are busted in New Orleans, 1970
Feb  1 	RCA Victor unveils the 45 rpm record playing system, 1949

Fortune of the day…

BOFH excuse #394:

Jupiter is aligned with Mars.

[]’s!

Some random bits of today…

Let me start off with one of these real men catches: Real men don’t attack straw men — by RMS.

But, let’s move to more down-to-Earth things…

• Caçador de plágios
• Brasil e França farão acordo estratégico
• Universidades Federais: “Por falar em verdades”; artigo de Ronaldo Mota
• Pós-graduação: Excelência em Ciências Humanas puxa diálogo com exterior
• Pós-graduação: Universo de cursos em Ciências Exatas e da Terra está em expansão

And now, let’s see some Math…

• 254A: Topics in Ergodic Theory
• 254A, Lecture 1: Overview
• 254A, Lecture 2: Three categories of dynamical systems
• 254A, Lecture 3: Minimal dynamical systems, recurrence, and the Stone-Čech compactification
• 254A, Lecture 4: Multiple recurrence
• 254A, Lecture 5: Other topological recurrence results
• 254A, Lecture 6: Isometric systems and isometric extensions
• 254A, Lecture 7: Structural theory of topological dynamical systems
• 254A, Lecture 8: The mean ergodic theorem

This business of “topological dynamics” really gets to me… need to learn more… much more about it!

[]’s!

Super holiday post…

Well, as you may have noticed, the blog has been a bit slow lately. Largely, this is due to the holidays… and some “other” stuff.

But, let’s focus on the business here: although i haven’t been posting, i did keep a record of everything that should be here. So, in this post, i’ll bundle it all together.

arXivs…

• Putting M theory on a computer
• From the Nambu-Goto the Sigma-Model Action, Memoirs from Long Ago
• Stochastic representations of Feynman integration
• A Higher Order Non-Linear Differential Equation and a Generalization of the Airy Function
• Idempotent and tropical mathematics and problems of mathematical physics (Volume I)
• Planckian Birth of the Quantum de Sitter Universe
• Integration of Superforms and Super-Thom Class
• Heisenberg Algebra, Umbral Calculus and Orthogonal Polynomials
• Remarks on the Friedman equations
• Differential Forms on Riemannian (Lorentzian) and Riemann-Cartan Structures and Some Applications to Physics
• Spectral resolution in hyperbolic orbifolds, quantum chaos, and cosmology
• Boundary conditions: The path integral approach
• Phase transitions and configuration space topology
• Formal Maurer-Cartan structures: from CFT to Classical Field Equations
• Towards lattice simulation of the gauge theory duals to black holes and hot strings
• Numerical solution to the hermitian Yang-Mills equation on the Fermat quintic
• Scalar Field Theory with a Non-Standard Potential
• Ricci flow deformation of cosmological initial data sets
• Hitchin integrable systems, deformations of spectral curves, and KP-type equations
• Supermetrics on supermanifolds
• Chaos in Partial Differential Equations, Navier-Stokes Equations and Turbulence
• Random and Integrable Models in Mathematics and Physics
• From Data to Probability Densities without Histograms
• Basic differential geometry as a sequence of interesting problems
• The flat FRW model in LQC: self-adjointness
• A note on quantum field theories with a minimal length scale
• Quantum fields, nonlocality and quantum group symmetries
• Geometric structures of the classical general relativistic phase space
• The Mobius Band and the Mobius Foliation
• Hermite expansions and Hardy’s theorem
• Heuristic Derivation of Blackbody Radiation Laws using Principles of Dimensional Analysis
• Unified geometric description of black hole thermodynamics
• Information is Not Lost in the Evaporation of 2-dimensional Black Holes
• Einstein-aether gravity: a status report
• Quantum Mechanics with Extended Probabilities
• Emergent physics: Fermi point scenario
• Gravity and Matter in Causal Set Theory
• Measurement of Quantum Fluctuations in Geometry
• Fractional Loop Group and Twisted K-Theory
• Towards the topological quantization of classical mechanics
• Freud’s Identity of Differential Geometry, the Einstein-Hilbert Equations and the Vexatious Problem of the Energy-Momentum Conservation in GR
• Spin — or, actually: Spin and Quantum Statistics
• Spectrum of Λ
• (No) Eternal Inflation and Precision Higgs Physics
• Energy, entropy and the Ricci flow
• From the Einstein-Cartan to the Ashtekar-Barbero canonical constraints, passing through the Nieh-Yan functional
• Killing Vector Fields, Maxwell Equations and Lorentzian Spacetimes
• Quantum charges and spacetime topology: The emergence of new superselection sectors
• Clifford modules and twisted K-theory
• Stable cosmological models driven by a free quantum scalar field
• Spacetime foam: from entropy and holography to infinite statistics and nonlocality
• Path Integral Quantization of Self Interacting Scalar Field with Higher Derivatives
• Modern space-time and undecidability
• On Tree Amplitudes in Gauge Theory and Gravity
• What is the entropy of the universe?
• Critical Review of Path Integral Formulation
• STRINGVACUA: A Mathematica Package for Studying Vacuum Configurations in String Phenomenology
• On the spectrum of pure Yang-Mills theory
• Monster symmetry and Extremal CFTs
• Quantum Graphity: a model of emergent locality
• Hitchin’s equations and integrability of BPS Z(N) strings in Yang-Mills theories
• Vacuum Structure and Boundary Renormalization Group
• Liouville gravity from Einstein gravity
• Asymptotically Flat Ricci Flows
• Sobolev of the Euler School

interesting bits…

• A Passion for Discovery
• Basic Bundle Theory and K-Cohomology Invariants
• The trouble with five
• South American countries join forces to boost biofuels
• USP traz de volta ao país nova geração de doutores
• Affine Varieties
• Vogan on the Orbit Method
• The Orbit Method
• From Einstein to Homer Simpson: Books of the Year
• East vs. West: The First Round
• Wikipedia Goes Open
• At 71, Physics Professor Is a Web Star
• RMS Tells It As It Is
• IBM e Universia Brasil firmam parceria para apoiar a formação acadêmica e a pesquisa científica na América Latina
• Insomniac Fish: Science Sensei 8
• Go Ahead, Put that Preposition at the End!
• Pootling Around with PDFs
• The Four Horsemen: Dennett, Dawkins, Harris, Hitchens
• John Maeda named next president of RISD
• Jovens talentos e a ciência no Brasil, artigo de Adriana Maria de Aquino e Cristina Maria Carvalho Delou
• Roytenberg on Weak Lie 2-Algebras
• ‘Test tube universe’ hints at unifying theory
• Two constants to rule us all
• If Google ran the arXiv: prospects of data mining in academia
• The QG-TQFT Blues
• An Economist Questions Intellectual Monopolies
• Búzios para 2008
• Two Cultures in the Philosophy of Mathematics?
• A War on Science
• The Trouble with PDFs
• The Best Man vs. Woman Explanation I Have Ever Seen
• Macaque monkeys ‘pay’ for sex
• 5 Unbelievably Cool Research Facilities
• The reading cure
• ‘The Science of Leonardo’
• Product rules for more complicated products
• Gradings of Rings and Modules
• The Hilbert Polynomial
• India aims for ‘quantum jump’ in science
• What does a blind mathematician do? (No, this is not a joke.)
• Bezout’s Theorem
• Rumors: milling
• J. Lucks’ comments regarding the arxiv.reddit.com
• The Enduring Art of Computer Programming
• Scientific American Magazine: Brazil’s Option for Science Education
• Open Politics
• Freeing the future of ideas
• Free Knowledge Institute
• A Mathematician’s Apology available online
• Scientific American Magazine: The Future of Physics
• People ask why I still use Pascal. Here’s why.
• Blogs in the classroom
• Google CEO says NASA should become more ‘open source’
• Why is Finland Europe’s technology leader? The prime minister explains
• Demimonde
• “If you don’t know how compilers work, then you don’t know how computers work”
• Brazil Amazon deforestation soars
• How the world invests in R&D
• Mario Schenberg (1914-1990): Física, Política e Arte
• A Call for More Dialogue Between Science and the Humanities
• Large cardinals and knot theory
• Probability paradox
• Uselessness of set theory?
• Open Students
• Book version of the blog
• arXiv now complete at the Academic Reader
• Monday Musing: Replying to Euler
• The Fibonacci Sequence in Tool’s Lateralus
• Pink Floyd: The Wall Screenplay
• 254A, Lecture 7: Structural theory of topological dynamical systems
• Machine-readable Open Access scientific publishing