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domingo, 30 de agosto de 2009

censo 1930-méxico-sonora-la colorada parte 1

Registro de datos de personas correspondiente al Censo de 1930 en México, para los siguientes pueblos de la cabecera municipal La Colorada en el Estado de Sonora que incluye los siguientes: CIUDAD-PUEBLO-RANCHERIA-RANCHO-COLONIA-CONGREGACION-HACIENDA


Censo 1930 Mex Son La Colorada Parte 1

My Heritage Search

Motor de Busqueda de datos Genealogicos a traves de MyHeritage usando un sistema basado ene Google.

sábado, 29 de agosto de 2009

PDF Search

PDF SEARH ENGINE.COM un motor de busqueda mas...

Libros PDF

Libros PDF , es un motor de búsqueda para libros gratis y además que sean en formato PDF.


Me topé con el siguiente motor de búsqueda, se ve bastante bueno y sólo te reresa resultados con ligas a libros para descarga directas gratis.


domingo, 2 de agosto de 2009

Informatica en Mexico

Historia de la informatica en Mexico

Historia de Estados Unidos

La Historia de Estados Unidos de América

Create Powerful Excel Dashboards

How to create a thematic map in Excel

By Jorge Camoues.
How do you create a map like the one above for your next presentation if you don’t have a mapping tool? Simple, create it in Excel. Easier said than done, right? Well, not really…Following the “geo-scatterplot”, in this screencast tutorial I’ll show you how to create a thematic map and color-code it, based on your [...]
Read the full article →

Free Genealogy Tools

Free Genealogy Tools, es una página que ofrece de manera sencilla herramientas para determinar relación de parentescos, definiciones de parentescos, cartas de relación, día de la semana de una fecha en particular, así como acceso a otras bases de busqueda de datos de familias con apellidos similares. La página esta en inglés de muy fácil comprensión.

In order to find the relationship between two biologically related people, all you have to do is answer a couple of questions. There are four different free genealogy tools available. Each of the free genealogy tools provides some of the same information, but in a different ways.
All these tools are free and the first tool is based on determining Common Ancestor and your relationships to that common ancestor. Another method is by describing the Relationships between a relative and another relative. The third and fourth free genealogy tools use genealogy charts interactively. One is called the Kinship Chart and the other is the Relationship Chart. Make sure you try this charts just for the fun!
If you are trying to find a lost family member or friend we have another free genealogy tool that might be useful. Give it a try at MyFamily People Finder.
We also have another fun tool for determining the day of the week for any date. With this you can determine the Day-of-the-Week for any birth date! Or anniversary date. Or whatever date. Try it out.

sábado, 1 de agosto de 2009

The Engineering ToolBox

Engineering ToolBox
Tools and Basic Information for Design, Engineering and Construction of Technical Applications including chemistry, mathematicas and mechanics tools.

10 Excellent Science Search Engines


Scirus searches over 450 million scientific items, and allows researchers to search for not only journal content but also scientists’ homepages, courseware, pre-print server material, patents and institutional repository and website information.

sci is a free federated vertical search service which retrieves content provided by its twenty-one partner scholarly societies (Acoustical Society of America, American Geophysical Union, American Institute of Aeronautics and Astronautics, American Institute of Physics, American Physical Society, American Society of Civil Engineers, American Society of Mechanical Engineers, American Vacuum Society, Audio Engineering Society, The Electrochemical Society, The Institute of Electrical and Electronics Engineers, Institute of Physics Publishing, International Union of Crystallography, Optical Society of America , Professional Engineering Publishing, The Royal Society, Society of Automotive Engineers, Society for Industrial and Applied Mathematics, SPIE, and The Society for Information Display).

A new version has just been launched. is a free, integrated single-search gateway to reliable science and technology information from 17 organizations within 13 federal science agencies.


Science Research

A free search engine allowing access to numerous scientific journals and public science databases.


Searches more than one million documents from scholarly journals, magazines, conference proceedings, and other special publications from prestigious scientific societies and technical publishers. In addition, through Scitation, members of Heriot-Watt University can access the full text of several journals published by the American Institute of Physics and other learned societies, including the American Society of Civil Engineers, the American Society of Mechanical Engineers, and the Optical Society of America.

wws is a global science gateway connecting you to national and international scientific databases and portals.


Science Accelerator
Science Accelerator searches science, including R&D results, project descriptions, accomplishments, and more, via resources made available by the Office of Scientific and Technical Information (OSTI), U.S. Department of Energy.


A free service provided by Heriot-Watt University which can help you find articles, books, the best websites, the latest industry news, job announcements, technical reports, technical data, full text eprints, the latest research, thesis & dissertations, teaching and learning resources and more, in engineering, mathematics and computing.
A much more specific search engine. This one is a search tool that only returns results from websites that have been selected for their optics content

Science resources by SPJ - International and Miscellaneous Science Sites


Journalism UK Science and Environment Page
Dozens of links to issues in Great Britian.

Find cool global news pieces.

This Web site is a gateway to high-quality Internet resources on science communication and public engagement with science.

European Science Links
It's somewhat limited compared to the Journalists Toolbox, but you can give it a try.

Europe's Science Media Center
Links to hundreds of research studies and stories.

American Math Society: What's New in Mathematics
Includes a 'Feature Column' monthly essays on mathematical topics), 'Math in the Media' (highlights of math news from science literature and the current media), 'Math Digest' (summaries of articles on mathematics), and the 'AMS Public Awareness Office'(press releases, contacts for journalists, and more).


American Association for the Advancement of Science

Martindale's The Reference Desk
An extensive set of health science links.
Resources that monitor a company?s claim on a label. Also helps customers decipher what?s on a label. Very handy in covering consumer issues.

Online Science Museum
Museum of Science and Industry in Manchester, England, has virtual exhibits on everything from aircraft and locomotives to photography and scientific instruments. You'll need a Shockwave plug-in to run it.

Biology Online
A comprehensive dictionary of biology facts contains links to related terms within its definitions. It also offers detailed tutorials on biology-related topics.
Answers basic questions about fuel cell technology and links to companies and universities doing research in that area.

USGS: Track Invasive Plant and Animal Species

A British biosciences site.
An anatomy education site.

Physics of Baseball Web Site
Links to academic research and studies about various aspects of baseball physics.

Baseball Research Center
Describes itself as the "Center of Excellence for the Science and Engineering of Baseball" for both experimental and analytical methods. The center focuses on baseball bat performance and durability, and the Center is the official certification center for all NCAA baseball bats and Major League Baseball bats.

Center for Science in the Public Interest

Disaster Finder
Run by the NASA Solid Earth and Natural Hazards Program, this service was created for the disaster community at-large so that the best links in disaster information could be found quickly and easily. Links are categorized within the Disaster Finder database according the Disaster services section of the Taxonomy of Human Services: A Conceptual Framework with Standardized Terminology and Definitions for the Field.

MSNBC/Live Science: How Earthquakes Work

Molecular Weight Calculator
Just input the formula, and it returns the molecular weight to 13 decimal places.

BBC: Science of Superheroes
The BBC examines the "science" behind comic-book superheroes. How can they do what they do.

Towards Electronic Journals: Realities for Scientists, Librarians and Publishers
This academic research focuses mostly on scientists' perspective as authors and readers, how changes over the years by publishers and librarians have affected scientists, and what they should expect from electronic journal and digital journal article databases. We describe some myths concerning scholarly journals and attempt to assess the future in a realistic manner.

PBS: The Gene Hunters
Companion site to the documentary on the mysteries of human disease.

All Species: Whole Earth Catalog
An attempt to name every plant, animal in microbe on earth.

Visual Physics
Interactive simulations and quizzes help you mine basic physics answers.

Stephen Hawking's Universe
Topics ranging from cosmology to real unsolved mysteries, including an "Ask the Experts" section.
Features, research and tools from the magazine site.



Eric Weisstein's World of Mathematics

Internet Connections for Engineers
An extensive listing of engineering and science resources.

American Engineering Campaign
Facts on engineering (an engineer created the snowboard, you know) and the 20 greatest achievements in engineering (Hint: The snowboard wasn't one of them.)

BBC SciTech

Harvard's Research Matters Site
A portal to news articles that span the range of research fields, from the humanities to social science to science to technology to medicine.

Popular Science
Tech news with some focus on science and medicine.

Scientific American
Magazine focusing on domestic science issues.

Science Week
A weekly that posts daily news briefs with science content.
This site provides scientists, researchers, engineers, and others with easy access to government resources related to science and technology.

Info - Encyclopedia and Reference Resource
Browse articles in all areas of topics within Earth & Environment, History, Literature & Arts, Health & Medicine, People, Philosophy & Religion, Places, Plants & Animals, Science & Technology, Social Science, Law, Sports, Everyday Life, and more. Includes Country Studies and North America Gazetteer.

American Journal of Physiology

Advanced Cell Technology
A cloning business that is simply "giving Mother Nature a hand in producing duplicates of animals.

How Stuff Works: Human Cloning

Grossology: The (Impolite Science of the Human Body)

Rachel Carson Institute: Environment
Carson is considered the mother of the environmental movement. Learn more about her and her career.

Longevity Web Site
Links to dozens of great physics education and reference sites.

Library of Congress: Science Reference Guides
Science research portal features news, conferences, studies and more.
Research and data from more than 15 science associations and publications.

UK: Recycle This

ECHO: Exploring and Collecting History Online
From George Mason University this site offer links to more than 5,000 history sites about science, technology and industry.

National Biological Information Infrastructure [NBII]
Federal, state, and local government agencies, and their partners from universities, nonprofit agencies, industry, have created this "broad, collaborative program to provide increased access to data and information on the nation's biological resources."

Greenpeace: Stop Greenwashing
Greenwashing describe the act of misleading consumers regarding the environmental practices of a company or the environmental benefits of a product or service. This Greenpeace site is a great resource to find more case studies of companies' greenwashing as well as other criteria and how to suggestions for businesses to go green ethically.

Public Library of Science
A nonprofit organization of scientists and physicians committed to making the world's scientific and medical literature a freely available public resource.
This site is a "global science gateway connecting you to national and international scientific databases and portals."

Online Periodic Table
An award-winning site that lists and explains all the periodic tables.

Becoming Human
A great site on paleoanthropology, human evolution and origins. Flash 5 is required and a high-speed connection recommended for the video.
A forensic scientist, Campbell will soon have a book out, "Legal Ease: A Guide to Criminal Law, Evidence and Procedure" and is offers contact information as a source at her Web site.

PBS Animal Encyclopedia
Hundreds of helpful facts and stats.

Science Republic

Women in Technology International
Active group in promoting women in the science and tech industries.

Center for Science in the Public Interest: Smart Mouth
A site about food science for kids.

USGS: Track River and Stream Flows
Helpful in covering floods, hurricanes.

Museum of Science and Industry
Promotional site for Chicago museum.
Tobacco processing tech company.

Northwest Science Writers Association
Geared toward the region, but the site has many resources helpful to science writers anywhere.

Archaeology Info.
Glossary, gallery of fossil examples, timeline of human evolution.

ResourceShelf: Tips on Free Science Search Tools

Discover Magazine: Top Science Stories, 2008

European Organization for Nuclear Research: Large Hadron Collider
Milestones, safety, facts and figures, background, how it works, etc.

Wikipedia: The Large Hadron Collider

Large Hadron Collider Home Page

News and articles on science, health, environment and technology.

WorldChanging: Global Warming Animations

NPR Science Friday: SciFri Videos

Chicago Council for Science and Technology

American Lung Association: State of the Air We Breathe
.PDF format of 2009 report.

Science U
A spinoff site from the Geometry Center at the University of Minnesota, this site explains science in basic terms.

National Science Foundation

Sense about Science

Google Scholar
Search journals, articles, academic papers and more.

Science search tool is "the most comprehensive scientific research tool on the web."

Online Journal Science Search Engine

Biology and genetics research.

NCBI: Entrez
Search life sciences publications.

Science resources by SPJ - Research-Orgs-Experts-Agencies


Community of Science
Search a free database of science experts.

Media Resource Service
Search a database of reputable sources on science info. from the Scientific Research Society.

American Association for the Advancement of Science
From The WebElements interactive periodic table allows you to click on any of the elements to get in-depth information. The information includes not just detailed descriptions and specifications of all the elements, but an audio clip describing the element, photos of the elements, and video clips in some cases. The site also includes a printable periodic table and a version for Palm Pilots.

The Office of Naval Research
This office manages the science and technology programs for the U.S. Navy and Marine Corps.

MDTV Medical News Now Inc.
A New Jersey-based organization that presents a television medical news program that airs on cable in about 20 states.

Access Research Network
A great science and design portal.

Research summaries by science experts.

Center for Science in the Public Interest
A consumer-watchdog group in Washington.

Genomic Glossaries and Taxonomies
Biotechnology & pharmaceutical terms (& definitions) not found in most dictionaries. About 3,500 + definitions for applications, biochemistry, bioinformatics, cheminformatics, drug discovery and development, genomics, molecular biology, proteomics (and beyond), tools and technologies.

National Science Foundation Ethics on Human Cloning

National Academy of Sciences

The Federation of American Scientists

Science resources by SPJ - Science News sites


News releases from medical and science research. Leonid Meteor Showers

Stanford University's Highwire Press
Links to databases of 150,000 articles from medical and scientific journals. Many full text articles are free.

The Scientist
A bi-weekly magazine for life scientists. In addition to bi-weekly print content (free with registration), the site also features a daily news service in which users can get a daily e-mail digest.
Health, environment, etc. Includes articles, research, statistics, podcasts and more.

Physical Sciences Information Gateway
Launched on Sept. 17, 2001, PSIgate is the physical sciences hub for the UK's Resource Discovery Network (RDN). From this page, users can search the PSIgate database, search an expanded catalog (PSIgate+) generated by harvesting pages from the PSIgate database, or search across RDN databases. Returns include resources focused on astronomy, chemistry, earth sciences, physics, history of science, and more.

PBS Bloodlines
This is an independent discussion site that accompanies the show about how conflicts at the intersection of science and the courts are defining the ways Americans will deal with the ethical, legal and social dilemmas created by new life technologies. The official site for the show is at

The Why Files
From the National Science Foundation, this site looks at the science, math and technology questions behind the news.

Harvard's Research Matters Site
It is a portal to news articles about research. Right now there are about 214 articles in it and it will grow weekly. It's contents span the range of research fields, from the humanities to social science to science to technology to medicine.

National Science Foundation News Page
Links to a digest, publications, legislative affairs and more.

Science News
One of the first and most reliable science news sites on the Web.

Artigen Science News
A great search engine with regular news updates.'s Science Tech Page

Google's Science News Directory

Provides links to the best science news in a variety of topic areas. It is an ideal site for a journalist seeking story ideas.

Cyanova Science News
An easy-to-use table of science news stories.

Stem Cell Research Archive
A great collection of stories from the Washington Post.

A site run by the Museum of Science, Art and Perception offers webcasts, a science news wire, a digital library and cool studies and presentations.

SelectSurf Science-Technology Links
Links to several great science sites.

Fagan Finder: Science Resources

Inside Science News Service
This site from the American Institute of Physics publicizes science stories that may have been missed by the general press. All of the material in the "Stories" section is original reporting that is available for journalists to use as source material. The "links" section has stories from elsewhere that may be of interest to journalists.

Center for Science in the Public Interest
Newsletters, studies and more.

Fusion Power
A British research site on a new type of energy that could make oil obsolete.

Science resources by SPJ - Space and Astronomy


NASA Earth Image Database
Thousands of pictures of earth and other research materials.

NASA Images Library
Great research and interactive tools.

NASA: Space Shuttle and International Space Station
Tracks solar wind, meteors, planet temps, etc.

Space Station Page
Links to several industry sites. Astronomy Center

NASA Watch
Track articles that criticize NASA.

NASA: Apollo 11

NASA Histories

NASA: History of Missions

NASA Apollo Gallery

We Choose the Moon
Cool Flash animation of the Apollo 11 mission. Includes a desktop tracker.

NASA Restored Footage of Apollo 11 Moon Landing

CNN: Apollo 11 at 30 The Story of Apollo 11

PBS Nova: To the Moon

Newseum: Dateline Moon

Poynter: History of U.S. Space Flight Links and Bibliography

NASA: Columbia Accident Investigation Board
Regular updates on the findings of the shuttle crash.

The Center for Orbital and Re-entry Debris Studies

Space Shuttle: Thermal Stress
A 1987 .PDF report about thermal stress on the orbiter upon re-entry.

Shuttle Independent Assessment Team(SIAT)Report, 2000 (.PDF file)

CNN:Shuttle Independent Assessment Team

CNN: NASA Summary of Shuttle Independent Assessment Team(SIAT)Report

IRE: Federal Contractors/Space Shuttle Database

NASA: STS 107 Press Kit
157 pages of .pdf.

NASA's Space Shuttle Columbia: Quick Facts and Issues for Congress
Six pages in .PDF format.

CRS Issue Brief: Space Launch Vehicles: Government Activities, Commercial Competition, and Satellite Exports
Twenty pages in .PDF format.

CRS Issue Brief: Space Stations
Twenty pages in .PDF format.

NASA: International Space Station Photos and Background of Columbia Crew
Interviews with each crew member while they were in space on this mission.

SAJA: Bio of Astronaut Kalpana C. Chawla
A detailed biography and links to stories about her.

NASA: STS-107 Overview, Bios

NASA: STS-107 Media Archive (Photos)

NASA: Shuttle Photo Archive

NASA: STS-107 Research Mission

Columbia Missions (with STS-107)

Google: Columbia Shuttle Links

NASA Shuttle Press Kit on STS 107
In .PDF format.

A Primer for Journalists Covering Space
An excellent master's thesis full of tips and ideas.

Jet Propulsion Laboratory

Goddard Space Flight Center (Maryland)

Marshall Space Flight Center (Huntsville, Ala.)

Howstuffworks: How Space Shuttles Work

Google Search on Shuttle Re-Entry

Houston Chronicle: .PDFs Shuttle Coverage
Every page of the Chronicle's Shuttle disaster coverage, from Saturday's Extra edition through today (Wednesday).

NASA: Space Shuttle Mission Basics

George Washington University: Space Policy Institute
Benefits of space research, satellites, etc.

Presidential Commission Report on Space Shuttle Challenger Accident
Rogers Commission Report - not all parts are online at this location.

NASA Space Shuttle Challenger: Observations on the Reliability of the Shuttle
A part of the Rogers Commission Report.

Houston Chronicle Space Page
In-depth coverage of the explosion.

IRE Space Shuttle Disaster Resources
There are at least 13 stories in our Resource Center about the Space Shuttle that might be of assistance.

Orlando Sentinel Coverage of Columbia

MSNBC: Space Shuttle Timeline 1981-2002

Google Moon
Use the image map to track past Apollo missions and zoom in on various areas.

Google Earth
Free site that allows you to zoom in on your address/zip code from a satellite image.

PhysLink Astronomy and Physics Online Sites Covering the Columbia
A gallery of cover snapshots from a sampling of sites and analysis of the effectiveness of their approach.

NASA Space Shuttle Challenger: Federation of American Scientists
A part of the Rogers Commission Report.

NASA: Space Shuttle Annotated Bibliography
Chapter 7.

Google: Challenger Accident Links

Yahoo!: Challenger Accident Links

Fear of Physics
Covers fundamentals, teaching resources.

National Center for Atmospheric Research: Radar Loops
Shows debris trail from shuttle.

CBS News: Stats on Space Fatalities
Features many key stats.

SpaceFlightNow: Radar Images
Radar image of debris field and links to data on mission.

Sky High Pix
NASA's Remote Sensing Tutorial offers a big collection of overhead shots across the country.

Great research and interactive tools.

NASA: Space Shuttle and International Space Station

American Meteor Society

Space Station Page

Vanderbilt Space & Science Exploration Site
McDonald Observatory at the University of Texas offers stargazing tools, moon calculator, search and other resources.

Vanderbilt Space & Science Exploration Site

Hubble Space Telescope
The official website.

Sky High Pix
NASA's Remote Sensing Tutorial offers a big collection of overhead shots across the country.


Earth Observatory
These satellite images allow you to see things such as bush fires in southeastern Australia and air pollution over China.

Windows on the Universe: Astronomy

Harvard's Interactive Observatory

NASA's Earth Observatory

NASA Jet Propulsion Lab

Sciencemaster: Space and Astronomy's Space Page

Hubble Telescope Press Releases and Images

USA Today: Solar Storms
Origins of solar wind, etc.
This online museum features a collection of more than 600 innovative, interactive exhibits about science, nature, art, technology, etc. Basics of Telescopes

Heavens Above
A very cool site. Register and identify your location, and the site tells you when to look in the sky for satellites, space station or shuttle.

Franklin Institute Inquirer's Guide to the Universe

Check Your Weight on Other Planets

Space Station Tracker

The Center for Science in the Public Interest
Articles, studies, news releases, safety tips.

Florida Today Space Section

Marshall Center Newsroom
The official Newsroom for Marshall Space Flight Center.

Space Station Science Operations News
The latest news about Space Station Science Operations, managed by the Marshall Center.

NASA's Chandra X-ray Observatory News
NASA's official site for news and photos on the latest discoveries by the Chandra X-ray Observatory.

Sky & Telescope
This site offers a simulated view of the nighttime sky from anyplace on earth.
A top-notch astronomy site.

Space Calendar

A great Flash presentation of space exploration.

Lunar Journals
Read nearly all of the audio transcripts from the Apollo moon missions, as well as images and backgrounders on each.
Educational space site.

Powers of 10
Interactive site explains the universe and interrelationships.

Mars Odyssey Image

Space Media Inc.'s Movies in Orbit

Astronautix Soviet Space History
Dozens of links to background, chronology and more.

Virtual Space Museum
History, canceled projects, etc.

University of Iowa: Space Audio

To The Moon
Apollo astronauts on the moon's surface provide 360-degree panoramas at this companion site to the PBS special that chronicles the untold science and engineering story of how they got there. (QuickTime plug-in required.)

U.S. Naval Observatory
Sun and moon data by year (from 1700 to 2100).

NASA: Apollo 8 Spaceflight Anniversary

Chicago Tribune: Apollo 8 Revisited

Smithsonian: The Apollo 8 Mission
Images, audio/video, facts, crew and mission summary.

Exploring the Moon: Apollo 8 Mission Quick Facts
Images, audio/video, facts, crew and mission summary.

Apollo 8 Video Search
YouTube video, images, etc.