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coldance

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[交流] 美国丹佛大学Dr James B. Calvert个人网站

美国丹佛大学Dr James B. Calvert个人网站,内容为一系列特殊专题的相关资料，资料罗列得较多和广泛，涵盖学科也很广泛，从物理到数学物理，再到数学，通讯，地质，天文，再甚至到一些人文学科等，强烈推荐！

虽没有通篇的pdf文档下载，对每个链接的网页文档布置得都很紧凑明了，就像一本CHM格式的电子书。

1.J. B. Calvert简介及网站说明
Dr James B. Calvert Associate Professor Emeritus of Engineering, University of Denver Registered Professional Engineer, State of Colorado No.12317

Latest revision 1 March 2007

Recent Additions and Revisions
The article on planetary (epicyclic) gear trains has been revised and expanded. The article on trochoids and gears has been revised. Articles on cycloidal gears and CV (constant-velocity) joints have been added.

How To Use This Website
For a discussion of Stonehenge, click on the illustration above. Times and dates on this site are GMT or Zulu 24-hour time, unless otherwise stated.

Welcome. These pages are intended to be viewed with Internet Explorer 4 or better running in Windows 98, on a full screen 800x600 pixels. This was by far the most common browser configuration. Currently, I myself am using WindowsXP and Internet Explorer 7.0 with a 17-inch flat panel monitor, and things look OK. I do not have the resources to design for a variety of platforms, so a compromise must be made. If you see α as a Greek letter alpha, fine. If you see an ampersand followed by alpha; your browser does not interpret these characters, unfortunately. Many of the pages with mathematics depend heavily on these special characters. Panels and colored backgrounds appear on this index page only. Pages can be printed out, or read with Lynx, with little difficulty. Graphics, however, are often important. There are quite a few links to external sites. If you find one that is broken, I would be grateful for notification of the fact. Sometimes sites are only temporarily down. Press F11 to toggle a full-screen view without toolbars and status bar. This site is free of cookies, new screens (except when you command it), textured and colored backgrounds, useless panels and animation, and other juvenilia seen on commercial sites. It is mainly text-oriented, since I have limited space on the server. I use JavaScript in a few places, but mainly only as an example of this feature, or for informative pop-ups. To edit a page, display it and use View/Source and the source text will be loaded into Notepad. Loading the page into Word 2003 will make editing nearly impossible, and ruin your page when it is saved again.

Some weblinks are included, but a search by, for example, the BBC search engine, will reveal more. Websites are ephemeral, and it is difficult to keep them up to date. I appreciate hearing about broken links, since I cannot check them all regularly. Sites from the domains .edu, .org and .gov are normally not vicious, and contain most of the useful information. The domain .com contains very nasty sites, normally with very poor information, that should be visited with care. The appearance of multiple cookies is a giveaway of criminal or commercial intent, so set your browser security at least to Medium. Internet information can be very disappointing. It is a shame that such a powerful medium has been so debased.

My spam blocker is working pretty well these days. I delete rather quickly, so if you do not get an answer to your email, try to make it look less like spam.

The Classics pages that have been unavailable because of an error in moving the files are again available. Most recent additions and changes: new pages showing how to use the HP-48G calculator for matrices, statistics, and iterative solving (see Economics, Mathematics, and Physics), conformal maps (Lambert and Mercator) and theory of analytic functions in Math (Complex Variables), as well as the complex inversion integral for Laplace transforms. Greek for Euclid has been revised and corrected, and a Greek font is available there (Jun 02). Latin for Mountain Men has also been revised. There are many new illustrated articles based on the chemical elements under Physics/Chemistry, and the Geology section has recently been enhanced. Some selected direct links are given below.

Some suggestions for reading (return here with the Back button on your browser, since the return links will not know where they are starting from):

The Electromagnetic Telegraph
Electrical Discharges
Mercury, including how to construct a barometer.
Electromagnetic Waves, Polarization, and Magnetic Poles tell about electromagnetism.
Vision and Color
Geysers tells how geysers work.
William Henry Harrison and Indian Wars in the Old Northwest
The War of 1812
Latin For Mountain Men
Greek For Euclid
The Corn-Hog Ratio
Words commonly misused in the paper
Train Order Accidents: a discussion of 68 accidents under time table and train order operation from ICC investigations
A Review of Electronics (Includes vacuum tubes and cathode-ray tubes, with many experiments for the home laboratory). Nixie clocks have just been added.
Tamiya planetary gearbox kit a new page on this excellent kit.
Many more internet links are being included on these pages, since in many areas internet resources are interesting and valuable. I have found that websites with .edu, .org or .gov addresses are not predatory, and usually have the best information. Some .com sites, especially those outside the United States, and including the excellent www.bbc.co.uk, with not only news, but an excellent and noncommercial search engine, are also safe. They may write one or two cookies, but this is usually not excessive. However, many American websites, even those directed towards children, are pernicious, and can be detected by the excessive number of cookie requests (your security level should be at Medium), and failed scripts--these include all kinds of vermin and low hucksterism, and attempts to load robots on your site and to make other messes. It is best to exit these sites as soon as possible. Unfortunately, they may act as hosts for good websites, who are not responsible for the trash. When I give such a link, I include a warning. I very much appreciate being advised of broken links, so that I can remove them.

Please select your field of interest from the headings in the index at the left. The links will lead you to an index page for the particular topic, from which you can select articles to read. The longer articles have a table of contents with links that may help you find what you want. There is no search facility, unfortunately, since I have not found one that I can set up easily, and do not have the time to write one. At the end of the articles, there is a link back to the index page, and at the bottom of that page, a link back to here. Of course, your browser's Back button can also be used when convenient. The level of the pages ranges from elementary to advanced, mainly the latter, but there is much curious information, and it is not "written down" to the reader as so much is today. In many cases, I have tried to explain complicated matters for the nonspecialist, but never without rigor. You will find mathematics here, unlike most other places, and Greek and Latin as well. Mathematics is not avoided, since it is essential to understanding what I wish to present. There is no personal information or editorializing except under Miscellaneous, where I hope it may be permitted. The general content does, of course, reflect my views on topics, but is not intended to attack or offend. Fortunately, most scientific articles are utterly noncontroversial. At present, Miscellaneous also includes web authoring notes. Pages are continually reviewed and updated as I learn more, and correct my errors. When they first appear, they may be very incomplete and tentative, but improve with age, I hope. All the information may be freely used noncommercially, but I would appreciate the customary attribution if you publish it. Please do not use material that is credited to other sources, but contact these sources directly, to see their requirements. Most reputable sites will allow you to use material noncommercially if you give proper credit. All commercial rights reserved.

--------------------------------------------------------------------------------

"Y con esto, Dios te dé salud, y a mí no olvide. Vale."
M. de Cervantes Saavedra

Composed by J. B. Calvert
e-mail: jcalvert@du.edu
All opinions are those of the author alone, and I beg tolerance if you do not agree.
All errors are my own responsibility, and I appreciate being advised of them.
All graphics and audio are my own, and were prepared by me, unless otherwise noted and credited.
All your base are belong to us.
ROC, ILY
www.du.edu/~jcalvert/

2.专题目录
The Telegraph---History of the Electromagnetic Telegraph; Telegraph and Telecommunications Lore
Egypt, Greece and Rome---Latin and Greek Lessons, Geometry and Egyptian Notes
Railways---Railway History and Engineering, Especially Signalling and Operation
American History---Historical Notes of All Kinds; William Henry Harrison; Heraldry
Physics---Physics and Chemistry; Electromagnetism; Quantum Mechanics; Group Theory; The Hodograph
Mathematical Physics---Physics Through Mathematics, from Analytical Mechanics to Relativity
Engineering and Technology---Historical and Tutorial Articles in Civil, Mechanical and Electrical Engineering
Optics and Visual Perception---Physiological and Physical Optics; Optical Illusions
Waves, Acoustics and Vibration---The World of Waves; The Severn Bore; The Guns of Barisal
Geology and Scenery---Llano Estacado; Chesil Beach; Volcanoes; Geysers; Will-o'-th'-Wisp
Meteorology and Weather---Weather Maps, Dynamics and Thermodynamics, Winds and Clouds
Oil, Economics and Statistics---Energy, Petroleum and Statistics; Clathrates; Corn-Hog Ratio
Astronomy and Observation---Astronomy, Monthly Guides, Meteorological Optics, Using Compasses and Clinometers
Humor and Oddities---Words, The Master of Paddington, Joliet, etc.
Miscellaneous---How to Contact Me, Internet Links, Opinions, Web Authoring, Recipes and Editorials.

[ Last edited by coldance on 2007-3-11 at 02:03 ]

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