Articles on this website


Contents of this Website

Calendar Software

Calendar Studies

Computational Science

Cryptography and Security

C/C++ Programming

Mathematical Software

.: Contents of this Website :.

In addition to software you can also find on this Hermetic Systems website many articles concerning calendars, encryption, computational science, etc. The main sections are as follows:

Word and Phrase Counting		File Indexing and Searching
Cryptography and Security		Website Tools
Calendar Studies		Calendar Software
Computational Science		Mathematical Software
C/C++ Programming		Miscellaneous

Below are listed partial contents of the main sections (click on the section headings to see the entire contents of each section). The title index gives an alphabetical list of selected pages on this site, and the sitemap gives a complete list (though not alphabetical) of all pages in English. There are also a FAQ, a What's New page and a list of most popular articles. There are also descriptions of several items of our software in German and in Spanish.

Word and Phrase Counting Hermetic Word Frequency Counter Software to ascertain frequencies of occurrences of words in a document. Hermetic Word Frequency Counter Advanced Version This acts on multiple files in multiple folders and will also count specified phrases. Zipf's Law	File Indexing and Searching Index Files Search Words Software for indexing and rapidly searching multiple text or text-like files (including HTML files) in multiple folders on hard disk, CD-ROM, etc.

Cryptography and Security Easy Email Encryption Lite A program for encrypting messages to send by email, and for decrypting encrypted messages received. Data Destroyer A program to overwrite the contents of single or multiple files before deletion so that the data cannot be recovered. Cryptosystem ME6 An encryption program which uses a symmetric key encryption algorithm (with 500-bit keys) to encrypt information in files for secure storage or transmission. Hermetic Stego A steganographic application for hiding a message file of any size within one or more BMP image files.	Website Tools Hermetic Sitemap Generator For building either HTML sitemaps or XML Sitemaps from the files in a local copy of a website. Easy HTML Construction Kit is web authoring software consisting of six separate tools, including a text to HTML utility and a table creator. Keywords Meta Tag Generator for automatic generation of keywords meta tags for HTML documents. Keywords Meta Tag Generator Advanced Version for operation on multiple files in multiple folders. Easy Graphics File Converter For converting graphics files from BMP, JPG, PNG and GIF to BMP, JPG and PNG (single file or batch mode).

Calendar Studies Types of Calendar Lunar, solar, lunisolar, rule-based, etc. The Julian and the Gregorian Calendars The Julian Calendar, the Gregorian reform and its adoption, astronomical year numbering, the Julian and the Gregorian Proleptic Calendars, and the accuracy of calendars. The ISO 8601 Date Format A note concerning date formats, especially the ISO 8601 date format. Julian Day Numbers The nature and origin of the Julian day number system. Chronological Julian Date An explanation of the concept with examples of use. The Hermetic Leap Week Calendar A calendar with an integral number of 7-day weeks in each year, and which stays in sync with the seasonal year. The Hermetic Lunar Week Calendar A solilunar calendar which avoids the problem of rescheduling with each new year. The Archetypes Calendar An accurate lunar calendar with (mostly) weeks of 10 days. Why Seven Days in a Week? Why not six or eight? The Structure of the Chinese Calendar How the Chinese Calendar depends on the times of astronomical events. The Maya Calendar Links to an explanation of Maya and European Dates, the correlation problem, and the yearbearer systems. The Liberalia Triday Calendar The Meyer-Palmen Solilunar Calendar The Goddess Lunar Calendar Writings by Others Articles by renowned calendrical scientists Karl Palmen, Simon Cassidy, Duncan Steel, Lance Latham, the Böhm brothers and others.	Calendar Software Easy Date Converter A conversion program which gives you the day of the week for a date, the Julian day number and more, and allows date arithmetic: adding a number of days to a date, etc., with or without inclusion of weekend days. In English and German. Easy Date Converter Advanced Version This version can perform batch processing of date operations and has a built-in programming language. Equinoxes, Solstices and Cross-Quarter Days For calculating accurate dates and times of equinoxes, solstices and the Celtic cross-quarter days for any year in the range 1 CE through 3000 CE (for both hemispheres). Lunar Calendars and Finder Software for conversion among dates in the Common Era and Julian Calendars and dates in several lunar calendars. The program also finds the dates, times and durations of solar eclipses (total and annular) and lunar eclipses (total and partial). Chinese/Vietnamese/Japanese Anniversary Dates Software for finding anniversaries (such as birthdays) in the Chinese Calendar when converted to the Gregorian Calendar; and for solving other such problems. Chinese Calendrics Software for converting between Chinese and Western dates and for obtaining other information such as the dates of Chinese New Year's Day for any year. Julian-Gregorian-Dee Date Calculator Converts between Julian, Gregorian, Dee and Dee-Cecil calendar dates in various formats, and adds and subtracts a number of days, weeks, months and years to or from a given date. Mayan Calendrics Converts among Maya and European dates in various calendar systems. In English and German. Printable Calendar A modest utility to help you keep track of things to do. Printable Hermetic Lunar Week Calendar Same but different. Identical Calendar Years How long do you have to wait before you can re-use that old wall calendar that you like so much?

Computational Science Five Cellular Automata Lattice Geometries Calculation of Metropolis and Glauber Transition Probabilities Computational Studies of Pure and Dilute Spin Models The Travelling Salesman Problem	Mathematical Software Factorizer A factoring and prime number program (also plots Erdös-Kac and Palmen Color histograms). Prime Number Spiral Software for exploring the Prime Number Spiral (a.k.a. the Ulam Spiral). In English and German.

C/C++ Programming Date Validation Which years have a February 29th? Static and Dynamic Allocation of Multi-dimensional Arrays *The Use of and & in C/C++ Use of the Debugger in Visual C++**	Miscellaneous About This Website How to convert a VB module to a DLL An Essay in the Philosophy of Social Science The Year 2000 Crisis External Links