49 Matching Annotations
  1. Last 7 days
    1. Behavior Engineering Model This page has a design that is not especially attractive or user friendly but it does provide an overview of Gilbert's Behavior Engineering Model. This is a model that can be used to analyze the issues that underlie performance. A six-cell model is presented. Rating 5/5

    1. Human Performance Technology Model This page is an eight page PDF that gives an overview of the human performance technology model. This is a black and white PDF that is simply written and is accessible to the layperson. Authors are prominent writers in the field of performance technology. Rating 5/5

  2. Feb 2019
    1. INVEST

      According to this checklist, a User Story should be:

      Indepedent (of all others)

      Negociable (not a specific contract for features)

      Valuable (or vertical)

      Estimable (to a good approximation)

      Small (so as to fit within an iteration)

      Testable (in principle, even if there isn't a test for it yet)


      1. Glossary: INVEST - Agile Alliance
      2. INVEST at XP 1-2-3 by Bill Wake
  3. Nov 2018
    1. Unless you need to push the boundaries of what these technologies are capable of, you probably don’t need a highly specialized team of dedicated engineers to build solutions on top of them. If you manage to hire them, they will be bored. If they are bored, they will leave you for Google, Facebook, LinkedIn, Twitter, … – places where their expertise is actually needed. If they are not bored, chances are they are pretty mediocre. Mediocre engineers really excel at building enormously over complicated, awful-to-work-with messes they call “solutions”. Messes tend to necessitate specialization.
  4. Oct 2018
    1. If the SM58 noise floor is calculated at room temperature, the voltage output is 0.00000032 volts.

      This is equal to -130 dBV. The SM58 Vocal Microphone Specification Sheet says:

      Sensitivity (at 1,000 Hz Open Circuit Voltage) –54.5 dBV/Pa (1.85 mV)

      At this sensitivity, the self-noise would be 94 - (-54.5 - -130) = 19 dB SPL, which is pretty typical and certainly not "lower than can be typically measured".

    1. Questions about the inclusivity of engineering and computer science departments have been going on for quite some time. Several current “innovations” coming out of these fields, many rooted in facial recognition, are indicative of how scientific racism has long been embedded in apparently neutral attempts to measure people — a “new” spin on age-old notions of phrenology and biological determinism, updated with digital capabilities.
  5. Sep 2018
    1. We can’t force two people to become friends, nor should we want to.

      How many social engineers does it take to change a light bulb? An infinite number. That's why they leave you in the dark till you become the change you seek and make your own light to live by.

      If you cant force two people to become friends, then how do 'diplomats' (political manipulators?) profess to do the same thing with entire nations? Especially while so often, using the other hand to deal the deck for other players, in a game of "let's you and him fight"; or just being bloody mercenaries with sheer might is right political ethos installed under various euphemistic credos. 'My country right or wrong' or 'Mitt Got Uns' or ...to discover weapons of mass destruction...etc.

      So much for politics and social engineering, but maybe we can just be content with not so much forcing two people to be friends, as forcing them to have sex while we're filming them, so we can create more online amateur porn content. LOL ;)

  6. Aug 2018
    1. Patreon Engineering Levels

      Engineering focus, but a very detailed rubric of how to rank different personnel levels. Could maybe be generalized/adapted for other fields.

  7. Jul 2018
    1. Figure 3: Motor system with flip switch and potentiometer

      Please add a wiring diagram that would allow someone to reproduce this circuit.

    2. Figure 2: Basic demonstration of theinterior operationof the CIA device, which includedthe gear train system, rack and pinion system used for lubrication, rollers, and catheter like tubing.

      I side view of this assembly would make it easier to see how the components interact.

    1. We noticed that the people who use the data are usually not the same people who produce the data, and they often don’t know where to find the information about the data they try to use. Since the Schematizer already has the knowledge about all the schemas in the Data Pipeline, it becomes an excellent candidate to store information about the data. Meet our knowledge explorer, Watson. The Schematizer requires schema registrars to include documentation along with their schemas. The documentation then is extracted and stored in the Schematizer. To make the schema information and data documentation in the Schematizer accessible to all the teams at Yelp, we created Watson, a webapp that users across the company can use to explore this data. Watson is a visual frontend for the Schematizer and retrieves its information through a set of RESTful APIs exposed by the Schematizer.
  8. May 2018
    1. plus the impedance of the path from the inverting input to ground i.e. R1 in parallel with R2.

      This is incorrect. If R1 is infinite and R2 is 0, the parallel impedance is 0 ohms, but the input impedance is much higher than the input impedance of the op-amp itself, due to feedback making the inputs very similar in voltage.

      The input impedance is actually

      $$(1 + A_0 B)\cdot Z_\mathrm{ino}$$


      • \(A_0\) is the gain without feedback (the open loop gain)
      • \(B\) is the fraction of the output which feeds back as a negative voltage at the input
      • \(Z_\mathrm{ino}\) is input impedance without negative feedback

      For the above buffer example, it would be close to \(A_0 Z_\mathrm{ino}\)

      See https://electronics.stackexchange.com/q/177007/142

      Simpson - Introductory electronics for scientists and engineers section 7.2 Negative Voltage Feedback explains this clearly

  9. Apr 2018
    1. 10–27

      Equation 10-27 is wrong:

      • Resistors are in parallel, their noise does not sum.
    2. Adding this and the 100-kΩ resistornoise to the amplifier noise

      This is 3 terms (10 MΩ noise, 100 kΩ noise, and amplifier noise), but the equation only includes 2.

    3. 10–25

      Equation 10-25 has several errors:

      • The left and right side are not equal.
      • Resistors are in parallel, so their noise does not sum.
      • Resistor noise needs to be multiplied by gain to be combined with 113.1 μV output noise of op-amp.
    4. 10–23)

      Equation 10-23 is incorrect:

      • The noise of the resistors does not sum, since the resistors are in parallel and load each other. It would be equal to a single 50 kΩ resistor producing 4.0 μV.
      • The 113.1 value is output noise. The resistor noise needs to be multiplied by the gain to get the output noise, too.
    5. 0.1 F

      Should be 0.1 μF

    6. 0.1 F

      Should be 0.1 μF

    7. The noise calculations have many errors. See annotations on https://via.hypothes.is/http://web.mit.edu/6.101/www/reference/op_amps_everyone.pdf for details

    8. which is 100

      actually should be multiplied by the non-inverting noise gain, which is 101

    9. TLE2201

      Should be TLC2201

  10. Mar 2018
    1. Science and engineering have a long tradition of offering solutions based on natural and built processes to improve quality of life and bring prosperity.

      Language can be found related to this in many engineering codes of ethics.

    1. Figure 8 on page 22 shows OA percentages for a number of engineering disciplines. Most of which appear near the bottom of the chart.

  11. www.analog.com www.analog.com
    1. The poles of the Bessel filter can be determined by locating all of the poles on a circle and separating their imaginary parts byn2where nis the number of poles.

      This is incorrect:

      • The poles are not located on a circle
      • The imaginary parts of the poles are not equally spaced

      To generate the poles of a Bessel filter you need to use root-finding methods on the reverse Bessel polynomials. There's no other shortcut that I'm aware of.

    2. The step response shows no overshoot

      This is incorrect: There is a small amount of overshoot in Bessel filters.

  12. Oct 2017
    1. ‘DeExtinction Movement’ (The Long Now Foundation, 2014b). This project supports the genetic engineering of endangered species (altering them physically to become more resilient in the Anthropocene) and the cloning and wholesale re-creation of extinct ones—passenger pigeons, wooly mammoths—work that founder Stewart Brand promotes as ‘genetic rescue’.

      The Long Now Foundation and its views open up a whole chasm of moral, ethical, and legal questions with this 'DeExtinction Movement'. How is genetically engineering endangered species a form of 'genetic rescue'? These species are dying out because of man and man's actions, which is a terrible reflection of the worst part of human nature, but it does not give us the right to clone nature and 'whitewash' all that we have done before. Just because we may have the capacity to do so, does not mean we should. We cannot simply decide that extinction is fine because we can create genetically engineered species in the future to 'make up' for our mistakes. How are we expected to learn from our mistakes if we can simply rewind and start again?

  13. Apr 2017
    1. Dr. Ken Adam
      Dr. Kenneth Adam, who worked on the Environment Protection board during the Mackenzie Valley Pipeline Inquiry, spent the majority of his career working as a professional engineer with numerous engineering companies and private consulting firms. Some of his experiences included working for Templeton Engineering (for additional information, see the annotation for Carson Templeton), I.D. Engineering, Sentar Consultants, and Earth Tech Canada. In addition to working in industry, Dr. Ken Adam had a highly successful career in academia. He was an associate professor at the University of Manitoba working in the Department of Civil Engineering from 1972 to 1976. Dr. Ken Adam specialized in the construction of winter roads, specifically in the Canadian North. Due to his expertise, he was able to publish several articles on the construction of winter roads. The topics of his papers included the environmental impact of snow and ice roads, the development of improved snow blowers and pavers, and much more. His journal article entitled “Snow and Ice Roads: Ability to Support Traffic and Effects on Vegetation” was published in March of 1977 in the Arctic journal Volume 30 Number 1 (Adam and Hernandez 1977). He had another journal article published in the Journal (Water Pollution Control Federation) Volume 46 Number 12 entitled “Hydraulic Analysis of Winnipeg Sump Inlets” in December of 1974 (Adam and Brandson 1974). These are just two of many articles Dr. Ken Adam has published. These papers were researched and published for the government and private business. His clients included the Department of External Affairs, Indian and Northern Affairs Canada, the Izok project, the Environment Protection Board, and others. Currently, Dr. Ken Adam resides in Winnipeg, Manitoba (Elves 2009). 


      Adam, Kenneth M., and Normal B. Brandson. "Hydraulic Analysis of Winnipeg Sump Inlets." Water Environment Federation, 1974: 2755-2763.

      Adam, Kenneth, and Helios Hernandez. "Snow and Ice Roads: Ability to Support Traffic and Effects on Vegetation." Arctic, 1977: 13-27.

      Elves, Daniel. Libraries of the University of Manitoba. January 2009. https://umanitoba.ca/libraries/units/archives/collections/complete_holdings/ead/html/Adam.shtml#tag_bioghist (accessed April 9, 2017).

    2. Carson Templeton
      Carson H. Templeton was born in Wainwright, Alberta. He earned a diploma studying Mining Engineering at the Southern Alberta Institute of Technology (SAIT) in Calgary, Alberta. He worked at the Madsen Red Lake Mine in Northwest Ontario as an Assistant Assayer, Boat Boy, and Post Office Manager. He attended the University of Alberta to continue his studies of Mining Engineering and graduated with a Bachelor of Science. During World War II, Templeton worked on the Canol Pipeline Project. He then helped construct airports alongside the Alaska Highway for military use. In 1948, Templeton was appointed Assistant Chief Engineer of the Fraser Valley Dyking Board. In 1950, Templeton was appointed Chief Engineer of the Greater Winnipeg Dyking Board. In 1955, Templeton founded a consulting engineering firm which he named the Templeton Engineering Company. Before the Unicity Amalgamation of Winnipeg in 1972, his company worked as the City Engineer for several small cities in Canada. His company performed engineering estimates for the Royal Commission on Flood Cost-Benefits. These calculations led to the construction of the Winnipeg Floodway. Additionally, Carson Templeton’s consulting engineering firm conducted research that supported the writing of “Snow and Ice Roads: Ability to Support Traffic and Effects on Vegetation” by Kenneth Adam and Helios Hernandez (Adam and Hernandez 1977). In 1966, his company merged with Montreal Engineering and Shawinigan Engineering to form Teshmont Consultants Ltd. Teshmont Consultants Ltd. has completed over 50 percent of the world’s high-voltage, direct current projects. Templeton served as the Chairman of the Alaska Highway Pipeline Panel and Chairman of the Environmental Protection Board during the 1970s. As the Chairman of the Environmental Protection Board, Templeton orchestrated the hearing process for the Environmental Impact Assessments for the Mackenzie Valley Pipeline Inquiry (Winnipeg Free Press 2004). 


      Adam, Kenneth, and Helios Hernandez. "Snow and Ice Roads: Ability to Support Traffic and Effects on Vegetation." Arctic, 1977: 13-27.

      Winnipeg Free Press. Carson Templeton OC. October 10, 2004. http://passages.winnipegfreepress.com/passage-details/id-89334/Carson_Templeton_#/ (accessed April 8, 2017).

  14. Jan 2017
  15. Nov 2016
    1. The participants with relatively strong spatial abilities tended to gravitate towards, and excel in, scientific and technical fields such as the physical sciences, engineering, mathematics, and computer science.
  16. Jun 2016
    1. ensure that you’re solving the right problem

      Lots to be said about misdirected problem-solving. Much of it has to do with people who are extremely competent at their job but whose job is narrower than it could be. For instance, engineers are unbelievably adept at finding a solution to almost any problem. But it’s relatively common for them to work on “the wrong problem”, something which may not even need solving in some cases or a solution which may bring completely new problems. Those who think of the human condition as a problem to be solved may apply this type of mindset to an inappropriate extreme. Hence Soylent and VR goggles for prisoners.

    1. the only real problem remaining is the user experience that entices teachers to contribute content

      Sounds a bit restrictive. Though there are hairy UX problems making it even more difficult for teachers to contribute content, many other issues are likely to remain, preventing contributions, even if the User Experience were optimal for every single potential contributor. In other words, it’s one thing to set “the problem to be solved” in a manageable way. It’s another to grasp the complexity of the situation.

  17. May 2016
    1. As such, scrum adopts an empirical approach—accepting that the problem cannot be fully understood or defined, focusing instead on maximizing the team's ability to deliver quickly, to respond to emerging requirements and to adapt to evolving technologies and changes in market conditions.


  18. Apr 2016
    1. the study of innovation shows that everything hinges on the hard work of taking a promising idea and making it work — technically, legally, financially, culturally, ecologically. Constraints are great enablers of innovation.
    2. But there’s a downside to the hackathon hype, and our research on designing workplace projects for innovation and learning reveals why. Innovation is usually a lurching journey of discovery and problem solving. Innovation is an iterative, often slow-moving process that requires patience and discipline. Hackathons, with their feverish pace, lack of parameters and winner-take-all culture, discourage this process. We could find few examples of hackathons that have directly led to market success.
    3. what if projects were designed to combine a hacking mindset with rigorous examination of the data and experience they glean? This would reward smart failures that reveal new insights and equip leaders with the information needed to rescale, pivot or axe their projects.

      Sounds somewhat like agile devlopment.

  19. Feb 2016
    1. In summary, teams which are "fairer", in two senses, tend to be more effective:

      • Those where members speak and contribute in roughly the same proportion (albeit possibly in quite different ways)
      • Those where members have an above-average sensitivity to what others are thinking and feeling
    1. Design-Oriented Analysis Rules and Tools, Dr. R. David Middlebrook

      Real problems usually have more variables than equations. So approximations and inequalities are essential.

  20. Jan 2016
  21. Dec 2015
  22. Sep 2014