A semana nos arXivs…

• Advanced Mechanics. Mathematical Introduction. (arXiv:0911.0411v1 [math-ph])
• Simulations of supersymmetric Yang-Mills theory. (arXiv:0911.0595v1 [hep-lat])
• New variables for the Einstein theory of gravitation. (arXiv:0911.0282v1 [hep-th])
• Spectral geometry as a probe of quantum spacetime. (arXiv:0911.0401v1 [hep-th])
• Spacetime and fields. (arXiv:0911.0334v1 [gr-qc])
• Skew-symmetric forms: On integrability of equations of mathematical physics. (arXiv:0910.5849v1 [math-ph])
• Dyson’s Instability in Lattice Gauge Theory. (arXiv:0910.5785v1 [hep-lat])
• Time, Topology and the Twin Paradox. (arXiv:0910.5847v1 [gr-qc])
• Feynman Propagator for a Free Scalar Field on a Causal Set (PhysRevLett)
• Beyond fractional derivatives: local approximation of other convolution integrals (RSPA)
• Stochastic expansions and Hopf algebras (PRSA)
• Gravity from a Particle Physicists’ perspective. (arXiv:0910.5167v1 [hep-th])
• Holography from conformal field theory (JHEP)
• Motivic Donaldson-Thomas invariants: summary of results. (arXiv:0910.4315v1 [math.AG])
• Asymptotic safety in gravity and sigma models. (arXiv:0910.4951v1 [hep-th])
• Lectures on holographic methods for condensed matter physics (ClassQuantGrav)
• Energy Landscape of Social Balance (PhysRevLett)
• Thermodynamics shows US chief executives are paid nearly 130 times too much
• This Week’s Finds in Mathematical Physics (Week 282)
• Cheaper Online Textbooks?
• Chern Classes: Part 1

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• Vitaly Ginzburg: a life in physics
• Interview with Manin
• Logicomix: An Epic Search for Truth
• Dreams of Better Schools
• My research paper was rejected to be published. What can I do?
• Explained: P vs. NP: The most notorious problem in theoretical computer science remains open, but the attempts to solve it have led to profound insights
• The Ph.D. Problem: On the professionalization of faculty life, doctoral training, and the academy’s self-renewal
• Race ends in dead heat; Einstein wins
• How messy it all is: Why More Equal Societies Almost Always Do Better
• Soros: Open Society
• What’s wrong with copyright? e Copyright: Want more artistic creation? Protect it less
• Graph Theory to the rescue
• Paul Dirac: Engineer, mathematician, philosopher, physicist
• The Waterloo Institute for Complexity & Innovation
• Lectures on Functional Programming (using Haskell)

'Mike's motto'

Anúncios

A semana nos arXivs…

• Y-system and Quasi-Classical Strings. (arXiv:0910.3608v1 [hep-th]) — mais um passinho na direção de se demonstrar a dualidade AdS/CFT
• Matter from Space. (arXiv:0910.2574v1 [physics.hist-ph])
• Higher-dimensional numerical relativity: Formulation and code tests (PhysRevD)
• Grothendieck’s definition of a group (alguém disse Langlands Duality? 😎 )

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• Destino: Animação Surrealista de Salvador Dali e Walt Disney
• O início de uma moderna revolução: Colunista associa período modernista ao surgimento de modelos que romperam com a física clássica — esse artigo vem em contrapartida a um que eu já citei anteriormente (semana passada), mas cito de novo, Abstract Science?
• Higgs, Dark Matter and Supersymmetry: what the LHC will tell us — o interessante mesmo é a citação do Weinberg, sobre o futuro da Teoria de Cordas —, mais comentários podem ser lidos no seguinte link: comentários do Weinberg sobre o LHC, o “Higgs” e Supercordas
• Brazil is the 21st-century power to watch — é um artigo bem escrito, no sentido de que o autor, sutilmente, aponta praquilo que o Brasil realmente tem de potencial; mas, esse não foi um artigo escrito pra ser balanceado e equilibrado em suas visões, então as descrições da violência, etc, são bem superficiais (não necessariamente incorretas, mas enviesadas…)
• My Life as a Quant: Reflections on Physics and Finance: pra quem está pensando em ingressar no Mercado Financeiro, essa é uma boa dica de livro, principalmente pra quem é mais quantitativo

E, pra quem ainda não sabe, o Michael Green (um dos autores dos volumes Superstring theory: Introduction e Superstring theory: Loop Amplitudes, Anomalies and Phenomenology — ainda um dos melhores livros sobre o assunto) foi o escolhido pra substituir o Hawking na Cátedra Lucasiana: Michael Green elected to Hawking’s Cambridge post — entre outros, o Witten e o Maldacena declinaram a oferta.

A semana nos arXivs…

Esta edição vem um pouco atrasada… mas, vem mais recheada também. 😉

• Superstring field theory equivalence: Ramond sector (JHEP)
• Quantum geometry and quantum dynamics at the Planck scale. (arXiv:0910.2936v1 [gr-qc])
• GGI Lectures on the Pure Spinor Formalism of the Superstring. (arXiv:0910.2254v1 [hep-th])
• The group aspect in the physical interpretation of general relativity theory. (arXiv:0910.2073v1 [gr-qc])
• The twin paradox and Mach’s principle. (arXiv:0910.1929v1 [gr-qc])
• A Review and Demonstration of The Essence of Chaos by Edward N. Lorenz. (arXiv:0910.2213v1 [nlin.CD])
• Global well-posedness of the Maxwell-Klein-Gordon equation below the energy norm. (arXiv:0910.1850v1 [math.AP]), com direito a comentários do próprio autor: Global wellposedness for the Maxwell-Klein-Gordon equation below the energy norm
• Generalized instantons in N=4 super Yang-Mills theory and spinorial geometry (JHEP)
• Ten-Dimensional Super-Twistors and Super-Yang-Mills. (arXiv:0910.1684v2 [hep-th])
• A bound on 6D N=1 supergravities. (arXiv:0910.1586v2 [hep-th])
• Building the International Lattice Data Grid. (arXiv:0910.1692v1 [hep-lat])
• Photonic Thermos (sim, é uma garrafa térmica fotônica 😯 )
• Girih by Egan

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• The Speed Of Computing
• Abstraction has its place in science as it does in art
• Malcolm Gladwell: How different are dogfighting and football?
• Cleverness is no more. This is a dumb Britain
• Windows Does Not Scale — alguém ainda se surpreende com essas notícias?! 😛
• A Brief History of Gummy Bears — putz, eu adoro gummy bears! 😎
• ChromeOS to be based on Debian — pra quem ainda não sabia… o Google usa Debian há muUuito tempo 😉
• On transparency in research funding
• Math Geek Mom: Women in Science and Math
• Aaron Toponce: A Case For HTML Email — Mashups: confesso que ainda não estou convencido… mas, parece que os argumentos estão ficando cada vez mais fortes… 💡

Cinqüenta anos de exploração espacial

Estupidez vs Ignorância

Leite com chocolate

A semana nos arXivs…

• Lectures on Differential Geometry of Modules and Rings. (arXiv:0910.1515v1 [math-ph])
• 2-Group Representations for Spin Foams. (arXiv:0910.1542v1 [hep-th])
• Financial Applications of Random Matrix Theory: a short review. (arXiv:0910.1205v1 [q-fin.ST])
• The Pure Spinor Formulation of Superstrings. (arXiv:0910.1195v1 [hep-th])
• A Dialogue on the Nature of Gravity. (arXiv:0910.0839v1 [gr-qc])
• Renormalization group trajectories between two fixed points. (arXiv:0910.1063v1 [math-ph])
• Lagrange-Poincare field equations. (arXiv:0910.0874v1 [nlin.CD])
• Light, Links and Causal Sets. (arXiv:0910.0673v1 [gr-qc])
• Cosmological singularity. (arXiv:0910.0374v1 [gr-qc])
• Non-perturbative Field Theory. (arXiv:0910.0812v1 [hep-th])
• Covariant Star Product for Exterior Differential Forms on Symplectic Manifolds. (arXiv:0910.0459v1 [hep-th])
• Cell processor implementation of a MILC lattice QCD application. (arXiv:0910.0262v1 [hep-lat])
• Lorentzian wormholes generalize thermodynamics still further
• Statistical challenges of high-dimensional data
• Observed universality of phase transitions in high-dimensional geometry, with implications for modern data analysis and signal processing
• Quasiparticles do the twist

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• Faheem Hussain — As I Knew Him
• Israel Gelfand, Sept. 2nd 1913 — Oct. 5th 2009
• Israel Gelfand
• Bourbaki Archives
• Science and the arts need not be strangers
• Intellectual Elitism? You get what you give.
• Gen-F Scientists Ignoring Social Networking
• Face it: Being a scientist can really suck
• Sounds Familiar
• Energy savings in black and white
• Pain and rheumatology: an overview of the problem
• The Short View — Financial Times sobre o Brasil
• CeeVee Creates Clean-Looks Resumes for Web or Print [Resume]
• Google Docs Viewer Bookmarklet Makes PDFs Less Freeze-y [Bookmarklet]
• Google Wave 101 [Google Wave]

… na cama

A semana nos arXivs…

• Three Etudes in QFT. (arXiv:0909.4424v1 [hep-th])
• The β-function over curved space-time under ζ-function regularization. (arXiv:0909.4122v1 [math-ph])
• Geometry of Renormalization. (arXiv:0909.4117v1 [math-ph])
• Three-dimensional topological field theory and symplectic algebraic geometry II. (arXiv:0909.3643v2 [math.AG])
• Aspects of Symmetries in Field and String Theories. (arXiv:0909.4057v1 [hep-th])
• Quantum Critical Dynamics from Black Holes. (arXiv:0909.3553v1 [cond-mat.str-el])
• Stochastic expansions and Hopf algebras
• All vacuum near horizon geometries in arbitrary dimensions. (arXiv:0909.3462v1 [gr-qc])
• Quantum gravity without space-time singularities or horizons. (arXiv:0909.3426v1 [gr-qc])
• Spontaneous Dimensional Reduction in Short-Distance Quantum Gravity?. (arXiv:0909.3329v1 [gr-qc])
• Replication regulates volume weighting in quantum cosmology
• The weak and strong ends of a theory
• The Gömböc: a nearly-impossible, self-righting, homogenous shape
• Ben-Zvi’s Lectures on Topological Field Theory III
• Steen on mathematics and biology
• Physics: The edge of physics
• Entanglement In The Macroworld

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• How To Write A Scientific Paper
• Science, Pseudoscience and Bollocks
• The socialisation of scientific and technological research
• A speech for the American Academy of Arts and Sciences
• Jono Bacon: The Art of Community Available For Free Download
• PyOpenCL lets you access the OpenCL parallel computation API from Python e PyCUDA lets you access Nvidia‘s CUDA parallel computation API from Python

A semana nos arXivs…

• Deriving particle physics from quantum gravity: a plan. (arXiv:0909.3223v1 [hep-th])
• Introductory Lectures on String Theory. (arXiv:0808.0663v1 [physics.pop-ph])
• Proof by Coinduction
• A speech for the American Academy of Arts and Sciences

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• Jono Bacon: The Art of Community Available For Free Download
• The Glamorous Life Of A Science Journalist
• Science Needs a Storyline
• Should scientists be policy advocates?

A semana nos arXivs…

• Time in quantum physics: From an external parameter to an intrinsic observable. (arXiv:0909.1899v1 [math-ph])
• Some remarks on the geometric quantization of contact manifolds. (arXiv:0909.2023v1 [math.SG])
• Space does not exist, so time can. (arXiv:0909.1861v1 [gr-qc])
• Spectral action in noncommutative geometry and global pseudodifferential calculus. (arXiv:0909.1261v1 [math-ph])
• Topics in Noncommutative Geometry Inspired Physics. (arXiv:0909.1000v1 [hep-th])
• Loop and surface operators in N=2 gauge theory and Liouville modular geometry. (arXiv:0909.0945v1 [hep-th])
• Chaos in Partial Differential Equations. (arXiv:0909.0910v1 [nlin.CD])
• 6 Lectures on QFT, RG and SUSY. (arXiv:0909.0859v1 [hep-th])
• Change Course, por Steven Weinberg
• Theory of Rumour Spreading in Complex Social Networks.
• B-N-R Part 3: PPAV’s and some details
• B-N-R Part 4: Prym Varieties
• B-N-R Part 5: Spectral Curves

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• Science And Journalism: Scientists Engage Journalists More Than Is Perceived
• Research, Not Relations…
• País investe menos de 25% que ricos em ensino
• Not All Interactive Engagement is the Same: Variations in Physics Professors’ Implementation of “Peer Instruction”
• Mathematicians: An Outer View of the Inner World
• Einstein has an H’ Index of 1?
• Mistaking Beauty for Truth in Science and in Economics — “Because of the success of perturbation theory, the physicists’ mathematical knowledge has reduced to a certain familiarity with the greek alphabet…”, R. Jost
• This Week’s Finds in Mathematical Physics (Week 279)
• Economics Is Not a Natural Science

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