I am currently the founder and principal engineer of the NdustriX "Software For Business Intelligence Analytics," which has applications in operations research, and optimization, (i.e., minimizing risk, while at the same time maximizing gain,) of business operations. The analytical methodology is based on the principles of non-linear high entropy dynamical systems from econophysics. The NtropiX "Software For Algorithmic Trading Of Equities," is a derivative works of the NdustriX software code base.

Prior to NdustriX, I was a member of the founding team of several high technology companies. I have been an executive in the high-technology industry for over three decades, and on the board of directors of several companies-which included interfacing with the venture capital community. I have a BS in EE/CS.

Since the late 1980's, I have been involved in the open source software community, and have written and supported over 130 programs with over a hundred thousand lines of code-there have been over a half of a million downloads of the programs. I have used Linux for over two and a half decades-including developing computer network security architectures. In addition, I have contributed many analog circuit designs to the community, (I'm a Fairchild Semiconductor IC design engineer alumni in Silicon Valley.)

When I'm not doing electronics engineering and technology, my hobbies include bicycling, skiing, in addition to hanging out with the folks in the Linux community.

You can contact me at john@email.johncon.com.

Site Map

• If you are interested in the Software For Business Intelligence Analytics, you might visit the NdustriX, site which has applications for strategic marketing, optimization of business operations and business process modeling, (BPM).

• If you are interested in the Software For Algorithmic Trading Of Equities, you might visit the NtropiX, site which uses the NdustriX software code base for non-linear high entropy dynamical system analysis, (e.g., econophysics,) of financial markets.

• If you are interested in the Historical Economics of the world since the late stone age, (about -5000 CE,) or the US since 1792, you might visit the Historical Economics site which is based on non-linear high entropy dynamical system analysis, (e.g., econophysics.)

• If you are interested in the Program for Binary Searching a Constant Flat File Database, (i.e., time series,) you might visit the NdeX site which has applications to implement "data blades" via partial key searches of financial time series for market analysis.

• If you are interested in the Software For Full Text Information Retrieval, you might visit the NformatiX, site which has applications for devising complex searches for financial content information.

• If you are interested in my publications, you might visit the Assorted Publications section of this page.

• If you are interested in an archive of my correspondence, you might visit the Assorted Correspondence section of this page.

• If you are interested in other software that I have written, you might visit the Software section of this page.

• If you are interested in what my wife Connie does, see her web page at http://www.johncon.com/connie/.

• If you are interested in the Software that is used to operate and maintain this site, you might visit my Thanks page.

Site History

This site has been on the Internet since January 7, 1989-it started as a UUNET/USENET/UUCP site. Astonishingly, the first message sent from the site is still available in Google's comp.unix.questions usenet archives. The domain, johncon.com, was registered with SRI/InterNIC on May 4, 1992.

Assorted Publications

• fractal.ps.gz - 2MB gzip compressed Postscript, or, fractal.pdf - 6 MB PDF, version of "Notes on the Fractal Analysis of Various Market Segments in the North American Electronics Industry," and fractal.tar.gz - Latex sources for the 700+ page document, which also includes the C Sources to the programs used in the analysis, and has a web site at NdustriX.

• org.ps.gz - Postscript version of "Notes on the Application of Algorithmic Principles to Organizational Analysis."

• org.tex.gz - Latex sources to "Notes on the Application of Algorithmic Principles to Organizational Analysis."

• asme.ps.gz - Postscript notes for "Academia and Business: A Win-Win Opportunity." American Society of Mechanical Engineers, 10th Young Engineers Forum, Sheraton Palace Hotel, San Francisco.

• slide.ps.gz - Postscript slides for "Academia and Business: A Win-Win Opportunity." American Society of Mechanical Engineers, 10th Young Engineers Forum, Sheraton Palace Hotel, San Francisco.

• asme.tar.gz - Latex sources for "Academia and Business: A Win-Win Opportunity." American Society of Mechanical Engineers, 10th Young Engineers Forum, Sheraton Palace Hotel, San Francisco.

Assorted Correspondence

The correspondence spans the late 1970's through the present, (some of the dates are incorrect,) and are concerned, (for the most part,) with the integration of information technology, entropic economics, and management theory into a unified concept of corporate management.

The correspondence is listed chronologically in each category:

• Entropic Economics and Industrial Markets, Marketing, and Business Operations. Most are in regard to a formalized methodology of business operations and models. (See also, fractal.ps.gz - 2MB gzip compressed Postscript, or, fractal.pdf - 6 MB PDF, version of "Notes on the Fractal Analysis of Various Market Segments in the North American Electronics Industry," and fractal.tar.gz - Latex sources for the 700+ page document, which also includes the C Sources to the programs used in the analysis, and has a web site at NdustriX.)

• Entropic Economics and Equity Markets. Most are in regard to a stochastic model of equity prices, and applications to the algorithmic trading of stocks, day trading, and exploiting market "bubbles". Many of the concepts are implemented in the program, tsinvest.tar.gz, which is the C sources for entropic analysis of equity prices, and have a web site at NtropiX.

• Entropic Economics and Management. Most are in regard to the formalization of corporate management methodologies that were distributed by the System Dynamics conference, the Business Process Redesign conference, the Learning Organization conference, and the Deming conference.

• Entropic Economics, Game Theory, General Mathematics, and Fractal Science. Most are concerned with the relationship between economics, game theory, fractal science, and formal mathematics-explaining how the consequences of self-referential systems and Nash equilibrium result in a complex system with fractal dynamics.

• Information Technology. Most are in regard to managing the dynamics of human organizations with information technology, and the implications to the decision process.

• Semiconductor, Computer, Software, Technology, and Electronics Engineering. Most are concerning the development methodology of technology and engineering, viewing the activities as a complex process, which is stochastic and may not be scalable.

• History of Technology. Most are observations about the historical perspective of technology and its relationship to civilization and the way we organize.

• Civilization, Anthropology. Most are observations about the stochastic dynamics of the history of civilization.

• If you are interested in things like the US GDP, equity values, industrial markets, economic "bubbles", and recessions/depressions, you might want to visit my six short articles on entropic economics, Quantitative Analysis of Non-Linear High Entropy Economic Systems, at the NdustriX site.

Software

All software is freely available and distributed as source code, at no charge, and was developed to facilitate inter-operability and portability across the Internet. The software is provided under license.

• fractal.ps.gz - 2MB gzip compressed Postscript, or, fractal.pdf - 6 MB PDF, version of "Notes on the Fractal Analysis of Various Market Segments in the North American Electronics Industry," and fractal.tar.gz - Latex sources for the 700+ page document, which also includes the C Sources to the programs used in the analysis of business models and optimization, and has a web site at NdustriX The NdustriX archive is at http://www.johncon.com/ndustrix/archive/.

• tsinvest.tar.gz - C sources for tsinvest, a suite of programs that use non-linear extensions to the random walk fractal model of equity prices for automated day-trading. The extensions are similar to the discreet time "logistic" (parabolic) function. The tsinvest program scans all stocks in a market deciding which should be invested in at any time by calculating the fractal statistics of all equities. The program uses statistical estimation techniques to estimate the accuracy of the fractal statistics. Different decision criteria are available as command line options which alter the statistical methodology and portfolio optimization. The tsinvest programs have their own site at NtropiX The NtropiX archive is at http://www.johncon.com/ntropix/archive/.

• ndex.tar.gz - C sources for ndex, a suite of command line utilities for fast binary searching sorted flat file constant databases. Partial key searches and files with tab delimited fields are supported in a multiuser environment. The ndex programs have their own site at NdeX. The NdeX archive is at http://www.johncon.com/ndex/archive/.

• rel.tar.gz - C sources for rel, a suite of programs and tools for building wide area full text information retrieval systems over the Internet, (i.e., competitive intelligence, or corporate knowledge based systems.) The search mechanisms are capable of sorting documents by relevance to keyword search criteria. Boolean operations (and, or, not, and grouping operators,) on multiple keywords are fully supported and the programs are capable of phonetic keyword search. The rel programs have their own site at NformatiX. The NformatiX archive is at http://www.johncon.com/nformatix/archive/.

• fax.shar.gz - Shar file of Latex facsimile document style sources. (See: fax.txt for particulars.)

• faxmail.txt.gz - Text file description of using the Unix mail system to distribute facsimile received by the HylaFax fax server.

• qt.shar.gz - Shar file of sh script sources for the Query Text program, a full text information retrieval system. (See: qt.txt for particulars.)

• rolo.shar.gz - Shar file of sh script sources for the rolodex program, a general purpose Unix text file database manager. (See: rolo.txt for particulars.)

• sendmail.shar.gz - Shar file of sh script sources for a BSD sendmail work alike for SysV, rel. 4.2.

• info.shar.gz - Shar file of sh script sources for an information retrieval program for the Unix mail system.

• archive.shar.gz - Shar file of sh script sources for an electronic mail message archive program for the Unix mail system.

• retrieve.shar.gz - Shar file of sh script sources for an electronic mail message retrieval program for the Unix mail system.

• address.shar.gz - Shar file of sh script sources for an electronic mail message address archive and retrieval program for the Unix mail system.

• pdict.tar.gz - Tar file of C sources for phonetic word lookup in the system dictionary. (See: pdict.txt for particulars.)

• tkbiff.shar.gz - Shar file of tk script sources for a Tk/Tcl implementation of a multi-folder biff for the X Window System. (See: tkbiff.txt for particulars.)

• btreeperl.shar.gz - Shar file of C sources for Btree operations for the Perl programming language. (See: btreeperl.txt for particulars.)

• ctreeperl.shar.gz - Shar file of C sources for FairCom Ctree operations for the Perl programming language. (See: ctreeperl.txt for particulars.)

• fquery.shar.gz - Shar file of C program sources for fquery, a file query/sort program. (See: fquery.txt for particulars.)

• optimize.shar.gz - Shar file of C sources for a linear programming optimization program.

• sigma.shar.gz - Shar file of C program sources for sigma (standard deviation) calculation program.

• strategy.shar.gz - Shar file of C sources for game theoretic optimal strategy program using linear programming techniques.

• dbappend.shar.gz - Shar file of C sources for a database data file manager. (See: dbappend.txt for particulars.)

• allocobj.shar.gz - Shar file of C library sources for a simple object oriented core memory manager.

• hash.shar.gz - Shar file of C library sources for hash table functions.

• strsort.shar.gz - Shar file of C library sources for binary sort and search routines.

• vm.shar.gz - Shar file for C library sources for general purpose virtual memory routines.

• xfigutilities.tar.gz - Tar C sources for programs that make bar graphs and pie charts in xfig file format. (See: xfigbar.txt, and, xfigpie.txt for particulars.)

• tscount.tar.gz - Tar file of C sources for counting the number of like records in a file. (See: tscount.txt for particulars.)

• mboxstats.tar.gz - Tar file of C sources for counting the messages in a Unix mbox file. (See: mboxstats.txt for particulars.)

• tsinvestsim-lognormal.tar.gz - Tar file of C sources for taking the sum of a time series in tsinvestsim format. (See: tsinvestsim-lognormal.txt for particulars.)

• dwatch.tar.gz - Tar file of C sources for programs that remote monitor log files and directories with local filters. (See: dwatch.txt, and, logwatch.txt for particulars; Note: these programs use the Linux F_NOTIFY operations for fcntl(2) and may not be portable to other operating systems.)

• rw.tar.gz - Tar file of C sources for the template/skeleton used to handle file I/O in daemon process that use Unix pipes. (See: rw.txt for particulars.)

• sine_sound.tar.gz - Tar file of C sources for generating calibrated sine waves by a PC sound card via stdin for testing audio equipment. (See: sine_sound.txt, white_sound.txt, and, whiteLF_sound.txt for particulars.)

• sunrise-set.tar.gz - Tar file of C sources for calculating sunrise and sunset based on location and timezone. (See: sunrise-set.txt for particulars.)

• ucspi-daemon.tar.gz - Tar file of C sources for interoperability, transaction processing, and concurrency control for the tcpserver and tcpclient programs at cr.yp.to/ucspi-tcp.html. (See: ucspi-daemon.txt for particulars.)

• cumulativesigma.tar.gz - Tar file of C program sources for cumulative normal distribution calculation, (See: cumulativesigma.txt for particulars.)

• poll.tar.gz - Tar file of C program sources for prediction of election outcomes based on polling data. (See: poll.txt for particulars.)

• chime.tar.gz - Tar file of C program sources for sounding tubular chime bells over a PC sound card. (See: chime.txt for particulars.)

• random_int.tar.gz - Tar file of C program sources for generating a uniform deviate random positive integer in shell scripts. (See: random_int.txt for particulars.)

• tspole-i.tar.gz - Tar file of C program sources for single pole low pass filtering of a time series. (See: tspole-i.txt for particulars.)

• tspeak.tar.gz - Tar file of C program sources for finding the local maxima and minima of noisy cyclic time series. (See: tspeak.txt for particulars.)

• tsunique.tar.gz - Tar file of C sources for removing duplicate records from a time series file. (See: tsunique.txt for particulars.)

• tsbinary.tar.gz - Tar file of C sources for generating a series of binary numbers. (See: tsbinary.txt for particulars.)

• tssequence.tar.gz - Tar file of C sources for generating a random and descending integer for reordering the records in a text file. (See: tssequence.txt for particulars.)

• cmd.tar.gz - Tar file of Procmail/Smartlist scripts for a Confirmed Mail Delivery agent that is very effective at protecting children's e-mail addresses from commercial e-mail. See, also, the Confirmed Mail Delivery web page.

• securingemail.txt - Procmail(1) script which is very effective at securing corporate e-mail systems. See, also, the Securing E-Mail page.

• ipchains.gateway.txt, ipchains.terminal.txt - firewall rules and security for a SOHO LAN. See, also, the IpchainsRules page. (See, also: Knoppix and Coyote Cookbook, for additional information, and a firewall script, using iptables, for a SOHO router/firewall.)

• quarantine.outlook.attachments.txt - Procmail(1) script to filter potentially malicious Microsoft Outlook® attachments. See, also, the Quarantine Attachments page.

• receivedIP.tar.gz - Tar file for C library sources of programs for auditing e-mail "Received: " IP addresses. See, also, the ReceivedIP web page.

• stochastic.UCE.detection.txt - Procmail(1) script which is very effective at reducing the amount of commercial e-mail received by users. See, also, the Stochastic UCE Detection page, which has a Theory section for those initiated in information theory, (sometimes called, informatics).

• Knoppix and Coyote Cookbook - Applications of Knoppix and Coyote Linux for information appliances-SOHO gateways, routers, firewalls, network address translation, personal work stations, remastering distributions, etc.

• procmail.lint - shell script for verifying the syntax, (i.e., "lint,") of Procmail(1) scripts.

• spnmeaUSB0.tar.gz - Tar file of C sources for using an inexpensive USB GPS dongle to obtain GPS time as an alternative to NTP.

• osmooth.tar.gz - Tar file of C sources for smoothing measured speaker frequency response. (See: osmooth.txt for particulars.).

Archive

The sources to all programs are available in the archive, http://www.johncon.com/john/archive/.

Hardware

All hardware documentation is freely available and distributed at no charge. The hardware documentation is provided under license.

• Spatial Distortion Reduction Headphone Amplifier - reduces the the "super stereo" effect when stereo music is played through headphones. There is a Addendum on the Spatial Distortion Reduction Headphone Amplifier site that describes software that implements the spatial distortion reduction scheme outlined on the site-it allows a RIFF/WAVE format selection from a music CD to be "digitally re-mastered" for use with headphones. It works especially well with portable high capacity CD/MP3 players, Additionally, there is a note on The Case For Stereo Headphones. Also, there is a section for measuring headphone response on the Using the Panasonic WM61A as a Measurement Microphone page.

• Direct Coupled Stereo Headphone Amplifier - is about the design of a high quality direct coupled headphone amplifier that eliminates output coupling capacitors-and their related problems.

• Terminated Tilted Folded Dipole Shortwave Antenna - for international shortwave broadcast news reception.

• EWE Shortwave Antenna - for international shortwave broadcast news reception.

• Linux System Gamma Calibration - for calibrating colors and brightness of the printed output from digital cameras.

• Linux Sound System Calibration - for calibrating sound cards for maximum dynamic range.

• Modem Telephone Dialing and CID Acquisition - uses a modem and computer to record telephone Caller Identification Data, (CID,) and dial personal phone numbers from a database.

• Control Program for the X10 CM17A and MR26A - a program to control the X10 CM17A Computer Interface and MR26A RF Receiver for building a home automation autonomous information robot, (e.g., 'bot,) that controls devices around the house and implements a security surveillance system.

• temp.tar.gz - Tar file of C sources for home automation using Maxim/Dallas Semiconductor's DS18S20 Digital Thermometer and DS9097U Universal COM Port Adaptor. See, also, the Using the Maxim/Dallas Semiconductor DS18S20 as a Temperature Sensor page.

• r8.tar.gz - Tar file of C sources for controlling the R. L. Drake R8 Communications Receiver via an RS232C serial port. (See: r8.txt for particulars.)

• Subwoofer Speaker Design - for designing subwoofer speaker systems to tailor the acoustic characteristics of a listening environment.

• Using the Panasonic WM61A as a Measurement Microphone - for acoustic analysis of sound systems using a Linux PC. The page was updated with applications for measuring room acoustics and headphone response.

• Room Acoustics - is about the measurement of room acoustics using a measurement microphone and includes empirical examples of an intuitive methodology.

• Distortion Considerations in Audio Power Amplifier Circuit Topology - is about the design of very low distortion audio power amplifiers, and their gain bandwidth requrements.

• Loudspeaker Design - is about the design of loudspeakers using the Thiele/Small parameters in Spice circuit simulation.

• Studio Speaker - is about the design of a studio quality, near field, loudspeaker monitor suitable for mixing, and mastering applications.

• B4N - is about using the methodology outlined in Studio Speaker to design four studio quality, near field, loudspeaker monitors using readily available components from online store fronts.

• DCSDRA - is about combining the concepts of the Spatial Distortion Reduction Headphone Amplifier, above, and the Direct Coupled Stereo Headphone Amplifier, above, to design a high quality headphone amplifier, suitable for studio and broadcast applications.

• Headphone Acoustic Reciprocity - is about measuring the frequency response of headphones.

• LM3886 Power Amplifier - is about a design methodology for using the LM3886 chip amp in high quality near field power amplifiers.

• DIY Negative Dry Etch PCB Fabrication - is about making DIY PC Boards, (by request.)

• Replacing Fluorescent Lamps with SMD5630 LED Strips - is about DIYreplacing fluorescent light tubes with SMD5630 LED strips, (by request.)

• Spice Analysis Of The C-Note Speaker - is about analyzing the C-Note speaker using gEDA and ngspice as a design environment.

• sprawACM0.tar.gz - Tar file of C sources for a command line serial terminal program for the Arduino. (See: sprawACM0.txt for particulars.)

• MotorKnob-filtered.ino.txt, - Arduino sketch that is a modification to the MotorKnob.ino sketch distributed in the Arduino Stepper library, adding a recursive DSP pole, (i.e., optimal low pass filter,) in the transfer function to reduce "bit chatter" from the Arduino A/D.

• arduino.shields.tar.gz - Tar file of gEDA sources for development of ArduinoUNO and Ardunio2560 PCB shields.

• spindle.ino.txt, - Arduino sketch demonstrating typematic control of of a small brushed motor's speed.

• Arduino Motor Driver - is about making DIY Arduino PCB motor drivers.

• Using Python's Complex Variables to Design Speakers - is about an expedient methodology for designing speaker enclosures with the Thiele/Small complex variable equations.

• Amplifier For the IMM-6 Electret Measurement Microphone is about the design of an amplifier for the Dayton Audio iMM-6 measurement microphone, including the gEDA and NGSPICE development files and a DIY PCB.

• sprawUSB0.tar.gz - Tar file of C sources for a command line serial terminal program for the esp8266. (See: IRsend.Xfinity.ino.txt for usage with IRremoteESP8266, replacing 3 remotes with one esp8266.)