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Popular Posts

Announcement: Writing a new book in Data Science and R&D projects

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About two years ago an idea was hovering through my mind, a question actually: Why is that “traditional” project managers fail so gloriously in managing teams, especially in the Research and Development (R&D) field of work? I let it mature for a while, thinking that someone will eventually write a book or something about it. Two years have passed and no one did it, so I figured, well, I guess I will have to do that myself. After sending the proposal to only few top publishers, I was privileged enough to land a book contract with Elsevier , which was indeed my first choice for this endeavor.  The subject of the book will be simple: Managing and coordinating teams in the R&D environment, specifically in the domains of Data Analytics, Machine Learning and Artificial Intelligence in general , where I have been working for more than two and a half decades as a professional. Specifically, it will focus on every aspect of teamwork from the first to the last day of a R&D projec...
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Hello x86: Low-level assembly coding for the 8086

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Hello x86: Low-level assembly coding for the 8086 wiring no-talking, in emulated 80286 / MS-DOS machine in DOSbox. This is a set of four "hello world" codes in x86 assembly, using single-segment 16-bit/i8086 instruction set. The purspose of this tutorial is to demonstrate how exact, minimal-space, yet razor-sharp is assembly coding, especially when dealing with such complexities like the segmented memory model of MS-DOS. The four versions are: Hello1.asm: Old-style standard directives, used by '70s-'80s assemblers, for .EXE output. Hello1C.asm: Old-style standard directives, used by '70s-'80s assemblers, for .COM output. Hello2.asm: Compact 'dot' directives, used by modern assemblers, for .EXE output. Hello2C.asm: Compact 'dot' directives, used by modern assemblers, for .COM output. The difference between .EXE and .COM comes from the MS-DOS era, when the first format required 'far' pointers (segment:offset) for memory ad...
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Fibonacci numbers in C (4 different ways)

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Fibonacci series in pure C no talking, using only vim and gcc in terminal, implementing four alternative designs: 1) Recursive: using the typical mathematical definition for Fib(n) 2) Iterative: using loop instead of recursion to avoid call stack overflows 3) Dynamic Programming: using buffer for cached results, calculated only once 4) Analytical: using the solution of the differential equation for Fib(n) Each option has its pros and cons, typically trading code simplicity for resources (recursion) or trading memory (cache) for speed. The purpose of this tutorial is to demonstrate coding discipline when working with very limited coding tools (command-line only in terminal) and alternative designs for use in different situations. Inline comments describe details about the code being written. Enable captions for more information on what is happening in each section of the video. Enable captions for more details and walk-through. Source code available at the Github repository (see chann...
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Text file line shuffling in Java

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This program is an elementary tutorial in Java illustrating basic syntax, subroutines and basic file I/O. Shuffling the lines of a text file is a very important step when preparing .csv training datasets for Machine Learning models. Java was originally created for rich web applications (see 'applets') and embedded programming, but it quickly became a general-purpose language with seminal cross-platform deployability due to the JVM design. In this example, legacy Java syntax is used for illustrating coding with the very first release (JDK 1.0) back in 1995. This means no support for generics, i.e., only 'Object'-based containers (Vector) and extremely limited API compared to recent versions. And of course no syntax highlighting or code completion features, which where not available in terminals with 'vi' and command-line compiler as the core development platform. Of course, the source can be compiled with today's Java 19 compiler just fine, with the -Xlint:u...
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FP epsilon estimation in Fortran

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Floating-point epsilon estimation in retro Fortran no-talking, in emulated 80286 / MS-DOS machine in DOSbox. This program implements floating-point 'epsilon' estimation in retro Fortran no-talking, in emulated 80286 / MS-DOS machine in DOSbox. This very short code demonstrates how easy it is to get the actual FP accuracy, i.e., the significant decimal digits in FP arithmetic operations. The result in Fortran 77 is seven FP digits for REAL type and 15 digits for DOUBLE PRECISION type, which are consistent with 2-byte and 4-byte float types, correspondingly, used in other programming languages of that era like C. Warning: In some older versions of Microsoft's Fortran 77, the batch process 'FORT.BAT' assumed that the input filename is given as argument *without* the '.FOR' extension. If it is given, then the output is unpredictable and usually results in a corrupted *original* (source) file! Make sure to always keep backup before compiling - I had to write th...
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