• Courses
      • Back
      • To be a Programmer (without Mathematics)
  • Posts
      • Back
      • Program solving
      • Storytelling
      • Technology plus ideas
      • Documents
      • Shortcuts
  • Services
      • Back
      • Web Services
      • Skills to hire
      • Links exchange
  • Contact us
      • Back
      • Login
      • Register
    • Español (España)
    • English (United Kingdom)
Spreadsheets. The best visual programming language.
The history of Spreadsheets is fascinating, from Richard Mattessich who in 1972 wrote the article "Budgeting Models and System Simulation" creating the concept, to Pardo and Landau, who tried to obtain a Patent.But the renowned inventor of Spreadsheets is Dan Bricklin, with his VisiCalc, which was available since 1979 and was, let's say, the first and most important computing tool in the hands of anyone when it was implemented for the first computer that we can call "personal".I kn...
Classic motors in Cuba 1899-2007
  Amazon puts in your hands the book: Classic motors in Cuba 1899-2007 (Spanish Edition). Launching by Hobbiesenred of the Book: "Classic Motors in Cuba".Dedicated: To the motorcyclists of Latin America, the world and especially to the Cubans.The legend of classic motors in Cuba began on September 3, 1899. Motorcycles continued to penetrate and, from that moment on, riders began to leave their footprints all over the island, thus maintaining their permanence, hegemony and development. This bo...
How I learned Neurosciences... with Björn Holmgren and Ruth Urbá.
Since my arrival at the Department of Neurosciences I noticed that the branch of Neuro Biochemistry was, as I say, very well represented by the brilliant Swedish researcher Björn Holmgren and his wife, the talented Chilean Ruth Urbá.In almost home-like conditions, since in fact we were working in what was known at the time as "The Laboratory House", they carried out intense research using mice as an experimental basis, and their contributions to the study of sleep and its physiolog...
My fellow operators.
{loadmoduleid 135} In other articles I have commented that in the 70s our Neuroscience department had a CID-201-B minicomputer compatible with the PDP-8 of the DEC company and that the CID-201-B had only a typewriter teletype, a perforated paper tape reader, and a paper tape printer.In order to use this equipment, after developing and fine-tuning each program, it was necessary to "punch" the tapes with the data, or, for example, use the CONCATISO program (see article) to convert t...
Technology plus Ideas.
Technology plus Ideas. In this section we intend to comment on technology applied or applicable in the future, as well as presenting ideas on various technological topics. You can add content by yourself if you register and request it to us at info@havanatrends.com Any technological comment is welcome. Any technological idea is welcome. This section contains technological topics from the past as well as ideas for the future. We look forward to your collaboration. Octavio Bae...
Speaking of robots in 1977.
One afternoon of the many in which the programs we developed took hours and even days to produce results, several colleagues were meeting near our computer and the topic of robots came up.Some of us talked about the distance between the human being and the automation of processes by computers, which by the way is currently maintained, others about the development of Neuroscience itself, others the development of mathematics and computing itself, in short, almost any topic fit into...
Cats on MEDICID-1
One of the most fantastic things about having a computer in our department in the 70's is that we could do with it what we wanted, literally, without having to go through all the bureaucracy created around the so-called "Calculation Centers", where weeks and even months passed between having an idea and getting a real program to implement it. In other words, we lived through the personal computer revolution years before it even existed.In those years a young researcher, the current...
The MEDICID-1. The great little equipment.
It was 1974 and an Engineer from the Department of Neurophysiology named Alberto Caro had designed a device for the experimental work of the department that could be controlled by our CID-201-B computer, compatible with the PDP-8, which I referred to in the article "CONCATISO. My first program.".Due to production priorities, the Central Institute for Digital Research (ICID) did not give us what would later be named as MEDICID-2 and for that reason, with great inventiveness, the eng...
Repagular Physics.
Octavio Báez Hidalgo Independent Researcher. octaviobh@gmail.com December 01, 2021 Contenido Repagular Physics. 1 We are the Dark Energy and Matter. A paradigm shift. 3 Matter, Energy, Time. 6 Programming. 10 Gravitonium. 13 Dimensions. 17 Time I. 20 Time II. 21 Particles. 22 Waves. 24 Light as base clock and h Planck repagular 3d minimum. 26 We are the Dark Energy and Matter. A paradigm shift. The objective of this research scheme is to establish the practical and theoretical b...
Main Motorcycle Agencies between 1940 and 1950 in Havana
Loading...
The articles presented in this space are the authorship of Onelio García Pérez and his friends, © www.HobbiesEnRed.com, based on empirical research, there have been few investigated periods as a result of addressing issues that go beyond the particular objectives of the Author. The historical approach present in the fascicles is the product of the li...
How I met Dr. Mitchell Valdés.
In other articles I have commented that in 1972 I was studying Pure Mathematics and I  coincide with Dr. Pedro Valdés (Peter, as everyone knows him) that he was continuing his studies in Mathematics to increase his working capacities in Neurosciences.We became good friends, we studied together in the University Park, in the Classrooms, in the Library, until one day he told me: "Tomorrow, Saturday, I'll wait for you at my house to continue."Saturday comes, I go to Peter's house, I r...
Pedro Valdés from Neuro found me... and I was looking for the same thing!
I will tell how I started working in the Department of Neurophysiology of the National Center for Scientific Research. It was the year 1971 and I was studying Pure Mathematics at the University and it turns out that a doctor, Dr. Pedro Valdés Sosa, better known as "Peter", also began to study Mathematics as a second career. Peter and I were together for almost two years, we became good friends, we even studied together. Peter was already a worker with many obligations, he skippe...
IMPORTANT Severe vulnerability CVE-2020-16898 of all Windows and its manual solution
You have to apply a security patch or do it by hand according to the news: https://news.sophos.com/en-us/2020/10/13/top-reason-to-apply-october-2020s-microsoft-patches-ping-of-death-redux/ On the Microsoft site according to: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16898 When you are going to download given the version of windows you have, a download of more than 1 GigaByte appears !!. Then on that same page it appears how it can be "resolved" by hand, whi...
POLICIES OF: ONE SERVICE OF FL CORP / HOBBIESENRED.
Loading...
The articles presented in this space are the authorship of Onelio García Pérez and his friends, © www.HobbiesEnRed.com, based on empirical research, there have been few investigated periods as a result of addressing issues that go beyond the particular objectives of the Author. The historical approach present in the fascicles is the product of the limited bibliography available. The works ca...
Terms and Conditions
This website is owned and operated by HavanaTrends. These Terms establish the terms and conditions under which you can use our website and services offered by us. This website offers visitors readings on how to solve problems by programming, real or fictional stories, link shortcuts for various interests, design, hosting, and programming services for websites and Android APKs, useful documents, as well as articles in our Store. By accessing or using the website of our service, you...
CONCATISO. My first Program. Second part.
CONCATISO. My first Program. Second part. By reading the first part you will already have an idea of the computational equipment that the Department of Neurophysiology had back in the years 1972... 1973 Now I will tell the other part: Professor Erwin Roy John, head of the Department of Neurophysiology at New York Medical College, donated to Thalía and her Department an analog "Transient Averaging" computer called "CAT" that was capable of obtaining, from synchronized stimuli an...
Do you want to stop Windows 10 updates?
As it will have happened to all of you that for years Microsoft has imposed its Windows 10 updates above any personal or business consideration of those who have bought its product.And let's not say that they are only critical and security updates, along the way it has already imposed more than five versions of Windows 10 associated with the "continuous update" system that they implemented as a universal solution to the problems of Windows 10 itself.Well, along the way there have b...
Tapes, Punched Cards, and Machine Time.
It was the 70's and then we only had a 12-bit 32 Kilo Words computer, as I have commented, but the problems that we had to solve, especially statistical ones, needed many more resources.So I took on the task of "circumventing the bureaucracy" of the Computing Centers with their way of working: "submit the program and data on paper" and after days or weeks: "come and collect your results" or "the program did not compile" or "the program failed", which made us fix the problems on pap...
FORTRAN. The best for calculus.
It was the 70's and I continued working as a programmer for the Neuroscience Department using the laboratory computer, which in other articles I have explained that it only had 32 Kilo Words of 12 bits each, a typewriter that could punch 8-bit paper tapes. channels (bits), and an 8-channel paper tape reader.I have also commented that I programmed coding "by hand", and as soon as it was available in the machine language assembler, and also in the LEAL language, which was "postfix".T...
My current works and ideas
My current works and ideas.Over the years I have been developing a series of works and research proposals that I would like to present to you as a whole for your consideration. For each one you will find here an introduction to the topic and also links to the complete content already more elaborated. Most of the topics are under development and from time to time I add or modify information. Keep this in mind so that from time to time you can revisit the topics that were of interest...
More In Technology plus Ideas  Documents  Storytelling  Program Solving  
  • Program solving
  • Storytelling
  • Technology plus ideas
  • Documents
  • Shortcuts
  • Services
  • Contact us
Back to top
© HavanaTrends 2005 - 2026
Developed by HT over Gantry 5 framework
  • Terms And Conditions
  • Privacy Policy