Thursday, February 17, 2005

Lewis Carroll Society of North America

Welcome to the Lewis Carroll home page. We hope to provide useful information for the Carroll enthusiast as well as the novice and all those in between. Cyberspace seems a suitable home for information regarding a man who didn't want his true identity linked to his best work. I was told to mention that he wrote Alice's Adventures in Wonderland.

Sunday, February 13, 2005

Professor David E. Joyce

David E. Joyce oldalan sok erdekesseg van. Tobbek kozott:

Euclid's Elements

The Huxley File: "This, THE HUXLEY FILE, is addressed to an audience ranging from those who never heard of Thomas Henry Huxley to those who are familiar with him and may even have read some of his work. For specific guidance on the various subjects he wrote about – fields ranging from the design of marine invertebrate structure to the design of a good human society – the cybernaut may refer to any of the 21 guides concluding this preview. Selections in THE HUXLEY FILE that appear only in obscure Victorian magazines or hidden archives will be of interest to those who do know him and may even have studied and published on him"

History of Mathematics

Phylogeny and Reconstructing Phylogenetic Trees: These few pages describe the problem of reconstructing phylogenetic trees with the help of a Java applet.

Math Puzzles

Physics detective

Rufus Jaeger, a world-famous physicist, is killed while demonstrating a live quantum experiment on stage - but was it an accident? Follow our ten-part 'murder mystery' to track down the killer.

Mese a tudomanyos magyarazat logikajarol

Mese a tudományos magyarázat logikájáról

Hol volt, hol nem volt, volt egyszer egy gazda meg egy napszámos. Egy szép napon kimentek a határba, hogy fölszántsanak egy darab földet, amely régóta parlagon hevert. A környék híres volt kavicsból épített házairól és kerítéseirõl.

Amikor az emberek végeztek a munkával, látták, hogy mennyi kavicsot szántott ki az eke. A napszámos izgatottan kiáltott fel: "Nézze ezeket a kavicsokat! Milyen sokáig nõttek a földben!" A gazdát zavarba ejtette ez az ontológiai kitörés, és csak annyit vetett oda: "Már régóta a földben lehettek, de egyáltalán nem nõttek." "Dehogynem! Hiszen nem egyformák! Vannak köztük öregebbek. Nézze azokat a nagyokat!" – hangzott a válasz. A gazda hátratolta a sapkáját, megvakarta a homlokát, és megkérdezte: "Ha egy göröngyöt földhöz vágok, nem törik egyforma darabokra, ugye? A nagyságnak semmi köze a korhoz." Majd egyre türelmetlenebbül folytatta: "Amikor felszántjuk a földet, mindig kiszedjük a köveket meg a kavicsokat. Minden évben egy kicsit jobban megtisztul a föld. Ez a darab sokáig parlagon hevert, ezért maradtak itt a kavicsok."

– Persze, békén hagytuk a kavicsokat. Ezért nõhettek nyugodtan.
– Ugyan már! Honnan veszed, hogy a kavicsok nõnek?
– Nézze csak meg a kerítéseket, ott az út mentén! Mindegyik düledezik, ugye?
– Na és? Mi köze ehhez?
– Sok. A kerítéseket ezekbõl a kavicsokból építjük. A kavicsok növekednek és kinyomják a habarcsot. Amikor már nincs köztük több habarcs, a fal ledõl.
– A fenét! A habarcsot a szél morzsolja szét. Amikor teljesen szétmállik a habarcs, semmi se tartja össze a kavicsokat. Hát ezért dõl le fal.

A napszámos a gazda arcát fürkészte, és csöndben tûnõdött ezen az egetverõ ostobaságon. A gazda megértette a pillantást, s már azon volt, hogy feladja. Hülye paraszt! Hirtelen nagyszerû ötletet támadt. Eszébe jutott a városháza a közeli nagyvárosban. Minden évben számtalan turista bámulja meg a gyönyörû épületet. Már több mint 300 éves, ráadásul kavicsból van. A gazda izgatottan fordult a napszámoshoz: "Gondolj a városházára! Ez a kavicsépület több száz éves, és még mindig áll! Na, ehhez mit szólsz? Kavicsból van, mégsem omlott össze." Válaszra sem várva folytatta: "Megmondom neked, miért. Mert a habarcsot minden évben átnézik, és ott, ahol kell, kicserélik. Ezért áll még mindig az épület."

A napszámos csak mosolygott, mindentudóan tekintett a gazdára és azt mondta: "Á, azokat a kavicsokat összetörték. Mindenki tudja: ha a kavicsot összetörik, meghal. Persze hogy áll a városháza. Az összes kavicsot megölték, hogy nõhetnének tovább? Nem is nyomják ki a habarcsot. Ezért nem dõl össze az épület." A gazda tudta, hogy vereséget szenvedett. Racionális érveit és remek bizonyítékait megdöntötték a racionális érvek és a zseniálisan felsorakoztatott bizonyítékok.

Patrick Doreian
The Journal of Irreproducible Results,
Selected Papers, 3rd ed., 1986. p. 182

Hogyan?

Nemrégiben jelent meg a Wiley kiadónál a How Things Work: The Physics of Everyday Life (Hogyan mûködik...: A mindennapok fizikája) címû könyv. Szerzõje, Louis Bloomfield, a Virginiai Egyetem bölcsészhallgatóinak ajánlja "jegyzetként". De nemcsak a tanítványok kérdezhetnek Bloomfieldtõl. How Things Work címû Web-lapján bárki felteheti kérdéseit, és õ igyekszik válaszolni. Ezekbõl a kérdésekbõl és feleletekbõl közlünk itt hónapról hónapra válogatást Louis Bloomfield szíves engedélyével.

Miert?

A New Scientist / Planet Science olvasói "tudományos" válaszra váró kérdéseket küldhetnek be a folyóiratnak. Ha szerencséjük van, néha több olvasó is felel (néha egy sem). Ezeken a lapokon a folyóirat kérdés-felelet archívumából közlünk idôrôl idôre válogatást.

Saturday, February 12, 2005

Mana Mana - easy jazzy electronica

manamana.hu

Skizoid barangolás a dub, easy-listening, jazz, electronica, hip-hop, broken beat, house sokszögben. Hírek, partidátumok és lemezajánlók meg amit akartok.

Friday, February 11, 2005

FM 34-40-2 Basic Cryptanalysis textbook

FIELD MANUAL
NO 34-40-2 HEADQUARTERS
DEPARTMENT OF THE ARMY
Washington, DC, 13 September 1990

Mathematics, Department of; University of Illinois at Urbana-Champaign

The mission of the Department of Mathematics is to pursue outstanding research and to provide high quality instruction in pure and applied mathematics. The Department offers mathematics instruction to undergraduate students in all disciplines. The Department has one of the largest and most comprehensive mathematics graduate programs in the world and supports a large number of postdoctoral positions, offering training for careers in the mathematical sciences. The distinguished faculty have interests in many areas of the mathematical sciences, including Actuarial Science, Algebra, Analysis, Applied Mathematics, Combinatorics, Differential Equations, Geometry, Logic, Number Theory, Probability Theory, and Topology. The Department's faculty conduct research that supports the on-going theoretical development of the mathematical sciences, and that simultaneously promotes the interdisciplinary use of mathematics in science, engineering and other fields.

The Math Times is published twice a year by the Department of Mathematics at the University of Illinois at Urbana-Champaign.

Algebraic Number Theory Archives

K-theory Preprint Archives

Robert B. Ash online konyvei

Abstract Algebra: The Basic Graduate Year
A Course In Algebraic Number Theory
A Course In Commutative Algebra
Complex Variables
A Pari/GP Tutorial

Thursday, February 10, 2005

Elonka Dunin krypto oldala

elonka.com
Ilyesmivel foglalkozik:

This is an unofficial list of well-known unsolved codes and ciphers. A couple of the better-known unsolved ancient historical scripts are also thrown in, since they tend to come up during any discussion of unsolved codes. There has also been an attempt to sort this list by "fame", as defined by a loose formula involving the number of times that a particular cipher has been written about, and/or how many hits it pulls up on a moderately-sorted web search.

Kryptos is a sculpture located on the grounds of CIA Headquarters in Langley, Virginia. Installed in 1990, its thousands of characters contain encrypted messages, of which three have been solved (so far). There is still a fourth section at the bottom consisting of 97 or 98 characters which remains uncracked. This webpage contains some information about the sculpture, including some photos collected from around the web, some rubbings of the sculpture taken by your intrepid webmistress, links to other articles and Kryptos discussion groups here and there, and information about other encrypted sculptures which have been created by the sculptor, James Sanborn.

Books and Online Resources on Cryptography - Recommended Reading List

The Cyrillic Projector - Another Sanborn code-sculpture

think again!

think again! will present a math problem every day. Sundays, Nundays, Rainy Days, and Nonexisiting Days included.

Why? you cry! A lot of reasons. Here are two.

If you are a math teacher or a parent you should feed your kids problems and challenges, not answers and the remote. Good problems are not easy to come by, so I will collect some here.

If you like to exercise your mind, I like to hear your thinking. That is what the comments section is for. How do you solve problems? Don't just give the answer, tell me how you found it. I like to learn from you.

Learning starts with questions and problems, not with answers and solutions. John Locke was right when he said that the mind is a fire to be ignited, not a pot to be filled.

The problems in 'think again!' are not problems, they are seeds to start you thinking. If a problem is too hard, simplify it. If a problem is too easy, generalise it. If a problem is not to your taste, solve a similar problem. Whatever you do, post a comment and share your thinking. Challenge the other readers, share with them your findings and how your mind operates.

Wednesday, February 09, 2005

OOoLatexEquation es TexPoint

OOoLatexEquation is an OpenOffice.org macro designed to manipulate LaTeX equations. It allows to insert equations into OOWriter and OOImpress documents as PNG images.

TexPoint is a Powerpoint add-in that enables the easy use of Latex symbols and formulas in Powerpoint presentations.

Wish List

Volt egy az amazonon is, meg ossze vissza mindenfele felretett linkek. Kiraktam ide oldalra, mert egyreszt jo, ha ossze van gyujtve, masreszt kozeleg az XXX es hatha a rokonok nem tudjak mivel lepjenek meg. Esetleg van valaki aki neha ranez erre a blogra es tud segiteni a tobbieknek is. (Ugye erted Ricsi?!:-)

Eric Meyer's Color Blender

This is the one the kids all love. Supply two color values in either hex, short hex, RGB percentages, or RGB decimals and get as many as ten colors shades between the two you supplied. Great for finding a color halfway between two shades you like, or mixing two colors together in various proportions.

Thursday, February 03, 2005

CC Mixter - The remix family tree

This is a community music sharing site featuring songs licensed under Creative Commons. To get this project started, we've dedicated the space to WIRED Magazine's November 2004 Issue, which featured 16 songs licensed under the Sampling Licenses. If you're into music, browse this site to hear the original WIRED tracks, and below each new songs that people have built from sampling them. If you're into sampling and cut-ups, we have the full tracks and loops in a ready to mix format.

Zagar azaz Zsager Balazs oldala

www.zagarmusic.com

Monday, January 31, 2005

O'Reilly Web Develpers' Library

HTML: The Definitive Guide By Chuck Musciano & Bill Kennedy
CGI Programming on the World Wide Web By Shishir Gundavaram
JavaScript: The Definitive Guide By David Flannagan
Programming Perl By Larry Wall, Tom Christiansen & Randal L. Schwartz
Web Master in a Nutshell By Stephen Spainhour & Valerie Quercia

Combined Index
Combined Search
Credits

Encyclopedia of Graphics File Formats y James D. Murray and William vanRyper

Why did we write this book? The short answer is that graphics file formats are immortal. Like it or not, data files from the dawn of the computer age are still with us, and they're going to be around for a long time to come. Even when the way we think about data itself changes (as it inevitably will), hundreds of millions of files will still be out there in backup storage. We'll always need a way to read, understand, and display them.

Symbolic Link Format

The Microsoft SYLK (Symbolic Link) format is used mainly for the interchange of spreadsheet data between applications such as Microsoft Multiplan and Excel. Files in this format might also be imported directly by business graphics applications. SYLK files are written entirely in ASCII and, like Lotus DIF and SDI, are application-independent. SYLK, however, incorporates several features not found in other spreadsheet data interchange formats.

Friday, January 28, 2005

Background applications listening for keyboard activity

The KeyboardListener class presented here allows capturing keyboard events even when another application is running in the foreground. Several threads inside your application might be listening for events in parallel, each handling the events in its own way.

The KeyboardListener class can only be used on Windows XP because its implementation depends on the Win32 methods RegisterRawInputDevices and GetRawInputData which are currently only available on XP.

Creative Commons & Science Commons

Creative Commons offers a flexible range of protections and freedoms for authors and artists. We have built upon the "all rights reserved" of traditional copyright to create a voluntary "some rights reserved" copyright. We're a nonprofit. All of our tools are free.

The mission of Science Commons is to encourage scientific innovation by making it easier for scientists, universities, and industries to use literature, data, and other scientific intellectual property and to share their knowledge with others. Science Commons works within current copyright and patent law to promote legal and technical mechanisms that remove barriers to sharing.

Thursday, January 27, 2005

Cairo - a vector graphics library designed to provide high-quality display and print output

Introduction

Cairo is a vector graphics library designed to provide high-quality display and print output. Currently supported output targets include the X Window System, OpenGL (via glitz), in-memory image buffers, and image files (PNG and PostScript). Initial work has begun on support for PDF file output. Cairo is designed to produce identical output on all output media while taking advantage of display hardware acceleration when available (eg. through the X Render Extension or OpenGL).

Cairo provides a stateful user-level API with capabilities similar to the PDF 1.4 imaging model. Cairo provides operations including stroking and filling Bezier cubic splines, transforming and compositing translucent images, and antialiased text rendering.

Cairo was once named Xr, (or Xr/Xc), so if you came looking for that software, you've found it.

Cairo is a free software library available under either the GNU Lesser General Public License (LGPL) or the Mozilla Public License (MPL).

This website is a wiki. If you'd like to experiment with it, please play in the sandbox.

MS Internal Coding Guidelines

Brad Abrams (Microsoft): Internal Coding Guidelines

FxCop

FxCop is a code analysis tool that checks .NET managed code assemblies for conformance to the Microsoft .NET Framework Design Guidelines. It uses reflection, MSIL parsing, and callgraph analysis to inspect assemblies for more than 200 defects in the following areas:
  • Library design
  • Localization
  • Naming conventions
  • Performance
  • Security

FxCop includes both GUI and command line versions of the tool, as well as an SDK to create custom rules.

Mozilla and XForms

"Traditional HTML Web forms don't separate the purpose from the presentation of a form. XForms, in contrast, are comprised of separate sections that describe what the form does, and how the form looks. This allows for flexible presentation options, including classic XHTML forms, to be attached to an XML form definition."

"This XForms project has the goal to implement the W3C's XForms 1.0 recommendation in Mozilla."

Sunday, January 23, 2005

XULPlanet

A xulplanet.com-on irjak:

Why use XUL?

The XML User Interface Language (XUL) is a markup language for creating rich dynamic user interfaces. It is a part of the Mozilla browser and related applications and is available as part of Gecko. It is designed to be portable and is available on all versions of Windows, Macintosh as well as Linux and other Unix flavours. With XUL and other Gecko components, you can create sophisticated applications without special tools.

XUL was designed for creating the user interface of the Mozilla application including the web browser, mail client and page editor. XUL may be used to create these types of applications. However, it may also be used any place you would use currently use a web application, for instance, when you need to be able to retrieve resources from the network and require a richer user interface. Like HTML, in XUL you can create an interface using a markup language, use CSS style sheets to define appearance and use JavaScript for behavior. You also have access to programming interfaces for reading and writing to remote content over the network and for calling web services. Unlike HTML however, XUL provides a rich set of user interface widgets for creating menus, toolbars, tabbed panels, and hierarchical trees to give a few examples.

This means you don't have to look for third party code or include a large block of JavaScript in your application just to handle a popup menu. XUL has all of these elements built-in. In addition, the elements are designed to look and feel just like those on the user's native platform, even supporting OS level themes in Windows XP and MacOS X. Or, if you prefer, you can use standard CSS to create your own look. The XUL widgets also support localization and have support for accessibility using OS level accessiblity interfaces.

Mozilla wiki es bugzilla

Meglepo modon wiki.mozilla.org es bugzilla.mozilla.org.

Monday, January 17, 2005

Budapest 2004.01.15.

Szombaton maszkaltam egy kicsit es probalgattam a karacsonyra kapott fenykepezogep panoramakep funkciojat.
















Mar csak arra kene rajonni, hogy hogyan tudok a Hello-val egyszerre tobb kepet is postolni, mert most minden kep egy kulon post-kent jelenik meg, amiket aztan szepen kitorolgetek.
Az is jo lenne, ha nem postolna egybol, csak egy draft-ot keszitene.

Saturday, January 15, 2005

List of free math books on the Net

"Hi, my name is Alexandre Stefanov and this is my homepage.
The reason for creating a site was my desire to make an extensive list of free math books on the Net."