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      Philosophers views through the ages about the legitimacy of colonialism

      ericbuijs · Friday, 12 March, 2021 - 12:32

    Colonialism

    During the centuries several philosophers debated about the legitimacy of colonialism (and imperialism). Where some were trying to legitimize the (brutal) practice of conquest and colonialism others struggled with the tension between universalistic concepts such as human rights and the realities of cultural pluralism. The article ends with present day ideas where indigenous people strive to recognize the political autonomy by addressing issues surrounding land rights and cultural distinctiveness.

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      debacle, purplebeetroot

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      Frightful Five becomes Frightful Six with Tesla

      ericbuijs · Thursday, 18 February, 2021 - 09:36

    I've looked at the Market cap of Tesla last Tuesday and noted that it had reached $783B which was more than Facebook ($770B) at that moment. A couple of years ago an article appeared of the Frightful Five (MS, FB, Apple, Alphabet and Amazon), an interesting observation about five American tech companies that dominate a large part of the global economy. Can we add Tesla to the Frightful Five making it the Frightful Six?

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      Matt

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      Threaded rod in Solvespace 3.0

      ericbuijs · Saturday, 19 December, 2020 - 16:47

    Threaded rod in Solvespace 3.0

    I just published a video tutorial about the new Solvespace 3.0 helix tool and how to design a thread with it. If you're interested in 3dcad and free and open source software, Solvespace is absolutely worth trying out.

    • Threaded rod in Solvespace 3.0

      Solvespace 3.0 RC1 has recently been released. This version is a huge upgrade from the previous one (2.3). One of the new features is the Helix tool. With the Helix tool a corkscrew a sketch can be extruded along a corkscrew like path. A useful application for this tool is the threaded rod. In this video I'll demonstrate how to design such a threaded rod. The Solvespace file of a threaded rod can be downloaded here: https://my.hidrive.com/lnk/LACIiOkW The background music in this video is a Piano Violin beat created by Nathan Buijs (license CC0) For this video I used Solvespace v3.0 RC1 on Mac OSX. Solvespace is open source (GPLv3 license) and is available for Window, OSX and Linux. It is developed by Jonathan Westhues and maintained by Whitequark and others. It can be downloaded here: http://solvespace.com/download.pl

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      This notebook/white board combo is infinitely more creative and productive than PowerPoint (Random thought).

      ericbuijs · Monday, 1 June, 2020 - 09:08 edit

    https://upload.wikimedia.org/wikipedia/commons/e/e9/Legal_pad_and_pencil.jpg

    I stopped using PowerPoint (or any other presentation software for that matter) many years ago. Perhaps it's the most stupid, time wasting piece of software that exists. Instead I use a cheap paper notebook to explore and elaborate ideas, make drawings and do calculations. To present, explain or discuss I use the white board (the black board was even better). In a one on one session I put a small white board flat on the table and have both drawing their thoughts on the board while discussing. Works like a charm because of the free form factor that doesn't hinder the mind.

    • Notebook

      A notebook (also known as a notepad, writing pad, drawing pad, or legal pad) is a book or stack of paper pages that are often ruled and used for purposes such as recording notes or memoranda, other writing, drawing or scrapbooking. History Early history During the fourteenth and fifteenth centuries notebooks, were often made by hand at home by drawing on them into gatherings that were then bound at a later date. The pages were blank and every notekeeper had to make ruled lines across the paper. Making and keeping notebooks was such an important information management technique that children learned how to do in school. Legal pad According to a legend, Thomas W. Holley of Holyoke, Massachusetts, invented the legal pad around the year 1888 when he innovated the idea to collect all the sortings, various sorts of sub-standard paper scraps from various factories, and stitch them together in order to sell them as pads at an affordable and fair price. In about 1900, the latter then evolved into the modern, traditionally yellow...

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      lps, Orbifx, Tiubuk

    DeGoogle my life

    It's been over a year that I started to DeGoogle my life and I must admit it's not easy and I'm still not done yet but I thought it was time to make a blog post about the choices that I made thus far. This blog post is also meant to help people making these choices when they want to DeGoogle and therefore I'll try to keep it up-to-date. Comments are therefore much appreciated.

    • DeGoogle my life

      According to Wikipedia to DeGoogle is the act of removing Google from your life. As the growing market share of the internet giant creates monopolistic power for the company in digital spaces, incr…

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      baja-nene, indyradio, preptorrent, Orbifx

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      My latest OpenSCAD tutorial

      ericbuijs · Monday, 18 May, 2020 - 10:36

    Distorted vase in OpenSCAD (NEW)

    It's been a long time since I uploaded a video tutorial but that has changed because currently I have much more free time. I just uploaded an OpenSCAD tutorial video. It's about a 3d printable distorted vase. I will try to upload more videos about OpenSCAD and Solvespace in the coming months.

    • Distorted vase in OpenSCAD (NEW)

      The distorted vase is a 3d printable vase that I designed in OpenSCAD. It’s a small script that I nevertheless want to share with you not because of the vase, there are plenty of nice designs out there, but because the script contains some little tricks. Undoubtedly the vase could have been scripted in many other ways and probably more efficiently too but this example demonstrates nicely to combine polygon, hull and intersection in OpenSCAD to create some neat shapes. How does it work? First we create a number of polygons. The polygon is two dimensional shape in the xy-plane. Next each polygon is transformed into a 3d-shape, the segment in the script, and placed around the origin with the height in the z-direction. The segments are evenly spaced thus creating a star like shape. Now the star-like shape is sliced in the z-direction and the hull operation is used to wrap each slice. All slices on top of each other result in the desired 3d-shape. The coordinates of all the polygons are contained by the matrix variable. To create a distorted vase I use the sine function to vary some of the coordinates. The variation is based on number of the segment. The sine function can get a value between -1 and 1 but I limit the values between 0 and 1 to give the vase a more funnel like appearance. Of course we need to multiply the sine function to achieve a visible effect. The possibilities are endless we could for instance make the height of the vase variable by adding another sine function but I leave that to the viewer. You can download my OpenSCAD file here: https://my.hidrive.com/lnk/EoCIC0h4 OpenSCAD is software for creating solid 3D CAD objects. It is free software (GPLv2) and available for Linux/UNIX, MS Windows and Mac OS X. Music in the introduction "4 Guitars" by Stefan Kartenberg (http://dig.ccmixter.org/files/JeffSpeed68/55279)

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