1,009 Matching Annotations
  1. Jul 2018
    1. Your digestive (say: dye-JES-tiv) system started working even before you took the first bite of your pizza. And the digestive system will be busy at work on your chewed-up lunch for the next few hours — or sometimes days, depending upon what you've eaten. This process, called digestion,

      A good website option to give students for online collaborative inquiry (when having students research, list this website)

  2. Jun 2018
  3. May 2018
  4. Apr 2018
  5. Mar 2018
  6. www.edx.org www.edx.org
    1. This serendipitous meeting on Steve Wheeler's blog back then was the spark that led to the creation of connected network at a point when I had recently developed an online space using moodle for supporting the teaching of languages at Warwick's Language Centre. The opportunity therefore to connect our student cohorts meant that we could set about creating a shared, large scale virtual exchange. 

      Connection, Unpredictability, Serendiptity, EDTECH developer MOODLE

  7. Feb 2018
  8. Jan 2018
  9. Dec 2017
  10. Nov 2017
    1. Hate groups or White supremacist groupslike the Ku Klux Klan have started to use the Internet tospread their beliefs, recruit new members, or even advocatehate crimes with considerable success

      The best example of this is white supremacist rally in Charlottesville, VA. It started out so casually just like any other FB event. SImilarly, terrorist organisations have an increased opportunity to spread their ideological stance and to recruit new membership. They have seized upon technological advances in Internet media distribution and online anonymity.

  11. Sep 2017
    1. © 2016 Thienemann-Esslinger VerlagTranslated excerptSebastian MeschenmoserRotkäppchen hat keine Lust

      Hier kannst du gern 3 Dinge tun!

      1. für dich interessante Vokabeln markieren und eine einfache Erklärung hinzufügen

      2. Auf die Fragen reagieren

      3. eigene Fragen stellen

  12. Aug 2017
    1. The system should be tuned such that the fastest generally available computer would not be powerful enough to emulate the slowest computer that would be allowed to run the game. Depending on the pace of progress of computer technology and the lifespan of the game, it might eventually be necessary to change these requirements and force the users of the slowest computers to upgrade their hardware if they want to continue playing the game. While this would be frustrating for these players, I don't have a problem with it as long as there is a contract between the players and the game company that both agree to and are bound by - it would be part of the cost of playing without cheaters. Though I would hope that independent servers without these restrictions would also be available if there is demand for them.

      In this article, the author thinks hardware limitation is rather a good thing, since game emulation is based on super powerful computers. This idea is apparently opposite to one of my previous resources that claims that hardware improvement is the key to get a huge progress on cheating prevention.

    1. Inside Digital Learning asked four authors of books about online education for their expert advice on how instructors and their institutions can excel in virtual course instruction. The authors agreed that the online classroom is different enough from the traditional one that faculty members and adjuncts need to create courses for digital delivery that are substantially different from those they teach on campus. And they said teaching online requires an even keener focus on student engagement than the face-to-face model does.

      The article outlines 7 basic tips for instructors teaching online: make it a group effort, focus on active learning, chunk the lessons, keep group sizes small, be present, parse your time and embrace multimedia assignments.

    1. The apparent legal threats that took down these paid hacking tools can be seen as a similar method to fix the game's cheating problem through non-technial means. And while keeping hackers out is important to the interests of fair play, GTA Online's use of microtransactions means hacks that can generate infinite in-game money impact a market that's reportedly worth half a billion dollars to Take Two.

      Hack is everywhere, GTA's case shows how online game hacks can directly cause a big amount of loss of money. Not only economic loss, the impression of the game on players are also worsened. So we can see for huge online game, it is super urgent to minimize cheating as much as possible.

    1. Cheating also appears to be infectious. The likelihood of a fair player becoming labelled as a cheater in future is directly correlated with this person’s number of friends who are cheaters. So if you know cheaters you are more likely to become one yourself. Cheating spreads like flu through this community.

      Infectiousness is cheating's another property, also the most bothering thing about cheating. Since cheating is infectious and people are easy affected by cheaters around them, cheating seems to be a unsolvable issue.

    2. Their idea is to use the structure of the network to predict the likelihood that a given player will become a cheat in future. In other words, the number of friends who are cheats determine how likely this player is to becoming infected with the ‘cheating virus’ in future, so to speak. They say they expect to do more work on this in future.

      This idea sounds reasonable, but still kind of ridiculous. Just because a player meets many cheaters, does not mean he or she is going to be a cheater under that influence. In this case, they cannot let those honest players take responsibilities.

    3. So gaming communities invest significant resources into finding and stopping cheaters. In the Steam Community, for instance, which has some 30 million users, cheats are clearly labelled so that other users can see them and so that servers can prevent them playing games from which they are banned (although they can play other games).

      The cheating issue has drawn a lot of attentions of game companies, they have been investing lots of resources on catching and limiting cheaters.

    1. Cheating is an issue in online games, and Blizzard is anticipating that cheaters may inevitably be an issue that they have to deal with in their upcoming team-based FPS, Overwatch. In a forum post written today, the developer talked about the penalties it’s imposing towards those who choose to cheat in the game.

      This is a news that Blizzard has done corresponding actions for cheating behaviors. Looks like being permanently banned is what most game platforms would like to do. Also there will be reporting system for players to supervise each other. We can see that game companies are trying best to prevent cheating behavior in different aspects. But still, their attention probably can never get loose.

  13. Jul 2017
    1. In short, online reading compre-hension is online research. Second, online reading also becomes tightly integrated with writing as we communicate with others to learn more about the questions we explore and as we communicate our own inter-pretations. A third difference is that new technologies such as browsers, search engines, wikis, blogs, e-mail, and many others are required. Addi-tional skills and strategies are needed to use each of these technologies effectively

      Literacy, in general, is not simply knowing how to read read text. It also extends to know what to do what the information you acquire from reading. Reading also encompasses underatanding. For example, underatanding traffic lights and signs are a type of literacy that not involve text, but they communicate meaning that you need to know how to read and synthesize into action.

    2. Finally, and perhaps most importantly, online reading may require even greater amounts of higher-level thinking than offline reading. In a context in which anyone may publish anything, higher-level thinking skills such as critical evaluation of source material become especially important online.

      Yes this is a big one. Even otherwise intelligent adults take online writing at face value without reading laterally.

  14. Jun 2017
    1. "Fostering student engagement Create a community of learners Foster student-to-faculty and student-to-student interaction Judicious and strategic use of humor Creative and engaging use of videos, chats, podcasts, wikis, and discussion forums Use blogs to facilitate reflective thinking, collaborative learning, and knowledge construction( 2) Stimulating intellectual development Create natural critical learning environments Generate provocative acts, questions, statementsReflect on students‟ inaccurate and incomplete preconceptions or mental models Use technology to create engaging and authentic content(3) Building rapport with students Understand one‟s student population and determine the amount of help neededLet students get to know their teacher Use introductory video or other self-disclosure resourcesKeep written records of communication that includerelevant student information Be flexible with deadlines and due dates Provide individualized feedback on assignments and activities"

    1. The University of Michigan Teach-Out Series offers an opportunity for learners around the world to come together with our campus community in conversation on topics of widespread interest.

      Short, 1-week, open courses offered on edX that explore timely topics

    1. Thisstudyexaminesthecomponentsofaself-pacedonlinecoursespecificallydesignedtoincorporateweb-basedpedagogytocreateanengaginganddynamiclearningenvironment.Itcomparesstudentperformanceinaself-pacedonlinecourse,aconventionalonlinecourseandatraditionalin-classcourseandrevealsthepotentialforstudentstothriveinawidevarietyofonlinecourseformats

      This study compares performance in a face to face, online and strategically designed self-paced online course. The results showed small performance improvements for the self-paced students compared with the face to face students and larger improvements when compared to the instructor paced online course. The researchers speculate that the increased flexibility allows learners to achieve maximum performance, but this result could also be attributed to the design improvements. They discuss the design improvements made to the self-paced course, but do not share any information about the design of the face to face or instructor paced online courses. It would be interesting to see if design improvements in those formats that provided the same opportunities for interaction and feedback would change the results.

    1. It used rich media and a mix of traditional and emerging asynchronous computer-mediated communication tools to determine what forms of interaction learners in a self-paced online course value most and what impact they perceive interaction to have on their overall learning experience. This study demonstrated that depending on the specific circumstance, not all forms of interaction may be either equally valued by learners or effective.

      The results show that students most highly value interactions with the instructor and content.

    1. If it can be established that student self motivation has a direct effect on remediation, it stands to reason that by finding a way to increase a student’s self motivation, the remediation process can be improved to increase the likelihood of success for a student who requires the use of remedial courses in the specialized classroom setting. Attempting to understand the factors that create a learning environment of poor motivation is an arduous task, but attempting to improve those factors that increase motivation is imperative.

      This study involves a self-paced developmental mathematics course (N=86). The results showed that the students' perceived intrinsic value of the learning was a significant predictor of success in the course. Motivation had a greater impact on students' ability to succeed than prior knowledge (based on ACT math scores).

  15. May 2017
  16. Apr 2017
    1. For about $3,000 each, telepresence robots -- which look like iPads mounted on small Segway self-balancing, battery-powered machines -- are making distance learning easier, clearer and more realistic for online students at hundreds of colleges and universities.

      I think this is cool!

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  17. Mar 2017
  18. Feb 2017
    1. entropyS

      We did not cover what entropy is in class. Entropy is discussed in Hakim's Newton at the Center book. Entropy is the tendency of the Universe to move toward more disorder. But, it will turn out in Physics and Chemistry that we can measure entropy, energy and a thing called enthalpy. It takes the 3 of them together to decide if a physical process or chemical reaction can happen in thermodynamics.

    2. Wien’s Equation

      So, what was this Wien's Equation that Planck was improving? Wien had come up with a formula that was really close to the one that Planck would describe. But, it didn't work for short wavelengths and high frequencies. Rayleigh and Jeans had earlier come up with a straight-line formula that worked for larger wavelengths and lower frequencies, but not the higher ones. Planck's was the first to work for both. To review the relationship between wavelength and frequency, see the phet simulation here.

  19. Jan 2017
    1. The first was that if it were true that the sun and other stars did not rise over the eastern horizon, but the eastern side of the earth sank beneath them while they remained motionless, then it would follow that after a short time the mountains, sinking downward with the rotation of the terrestrial globe, would get into such a position that whereas a little earlier one would have had to climb steeply to their peaks, a few hours later one would have to stoop and descend in order to get there.

      Oh, he got me! When I read this the first time, I thought Galileo was making a mistake here. But...

    2. The other was that if the diurnal motion belonged to the earth, it would have to be so rapid that anyone placed at the bottom of a well would not for a moment be able to see a star which was directly above him, being able to see it only during the very brief instant in which the earth traverses two or three yards, this being the width of the well. Yet experiment shows that the apparent passage of such a star in going over the well takes quite a while--a necessary argument that the mouth of the well does not move with that rapidity which is required for the diurnal movement. Hence the earth is motionless.

      Fun! New addition to our Aristotle Leads the Way class for the Eratosthenes Homework!

    3. So take a sheet of paper and the compasses; let this page be the enormous expanse of the universe, in which you have to distribute and arrange its parts as reason shall direct you. And first, since you are sure without my telling you that the earth is located in this universe, mark some point at your pleasure where you intend this to be located, and designate it by means of some letter.

      New homework assignment for Aristotle Class! Hurrah!

    4. They, as most reverent and most humble slaves of Aristotle, would deny all the experiences and observations in the world, and would even refuse to look at them in order not to have to admit them

      Aristotle famously fought with his teacher, Plato, that we should make observations. Galileo is making the point that the Peripatetics are just quoting Aristotle's writings. They have not understood what he said about how science should be conducted. Aristotle went out into the world to observe things for himself.

    5. fault of the computer

      No, they didn't have computers. :-) The word computer used to refer to the person who is doing the math-- like in the movie "Hidden Figures" that tells the story of the African American women who did the math for the early NASA missions. For quite a while, many in computer science and astronomy thought that only a woman's brain was suited for being a computer or a programmer. https://youtu.be/WnZRw8juTsQ

    6. In the long run my observations have convinced me that some men, reasoning preposterously, first establish some conclusion In their minds which, either because of its being their own or because of their having received it from some person who has their entire confidence, impresses them so deeply that one finds it impossible ever to get it out of their heads.

      Still a problem for us today! This is why credible scientific experiments must always be designed to compensate for the "Cognitive Biases" of the experimenters and-- when humans are also the subjects-- of the subjects.

    1. Nor in this case is there any use in Copenicus saying that this motion, because it is natural to the earth and not constrained, works contrary effects to those of forced motions; and that things which are given impetus are destined to disintegrate and cannot long subsist, whereas those made by nature maintain themselves in their optimum arrangement.

      Simplicio has a point here. Copernicus has proposed how things work outside the conditions we have on the Earth. Simplicio is saying-- "Hey, you want us to observe things? When we observe things, stuff doesn't move perpetually without someone moving it on purpose." It turns out that Copernicus was right-- in space, we don't have the issues of air-resistance and some of the other forces that slow moving objects down.

    2. Aristotle's arguments are drawn mostly from the things around us, and he leaves the others to the astronomers. Hence it will be good, if it seems so to you, to examine those taken from earthly experiments, and thereafter we shall see to the other sort.

      Galileo puts himself forward as the true Aristotelian in several places-- because they were both people who decided to observe first and then decide things.

    3. Then why are two circular motions not contrary? Being made upon the surface of the land or sea, which as you know is spherical, these motions become circular. Do you know what circular motions are not contrary to each other, Simplicio? They are those of two circles which touch from the outside; one being turned, the other naturally moves the opposite way. But if one circle should be inside the other, it Is I . impossible that their motions should be made in opposite directions without their resisting each other.

      Galileo will get some stuff wrong about curved motion being the natural motion, but this bit he gets very right. And, it is something that is really hard for people to remember. We somehow "get" that linear momentum is a thing, but angular momentum is still amazingly surprising. Check out this video for an example of that.

    4. I should think that anyone who considered it more reasonable for the whole universe to move in order to let the earth remain Fixed would be more irrational than one who should climb to the top of your cupola just to get a view of the city and its environs, and then demand that the whole countryside should revolve around him so that he would not have to take the trouble to turn his head.

      Love this!

    5. For a simple movable body there can be but a single motion, and no more, which suits it naturally; any others it can possess only incidentally and by participation. Thus when a man walks along the deck of a ship, his own motion is that of walking, while the motion which takes him to port is his by participation; for he could never arrive there by walking if the ship did not take him there by means of its motion.

      Thought Experiment on the Principle of Relativity, Part 2.

    6. it does not act, and is as if It did not exist. Thus the goods with which a ship is laden leaving Venice, pass by Corfu, by Crete, by Cyprus and go to Aleppo. Venice, Corfu, Crete, etc. stand still and do not move with the ship; but as to the sacks, boxes, and bundles with which the boat is laden and with respect to the ship itself, the motion from Verflice to Syria is as nothing, and in no way alters their relation among themselves. This is so because it is common to all of them and all share equally in it. If, from the cargo in the ship, a sack were shifted from a chest one single inch, this alone would be more of a movement for it than the two-thousand-mile journey made by all of them together.

      The Thought Experiment on the Principle of Relativity, Part 1.

    7. having divided the universe into two parts, one of which is necessarily movable and the other motionless

      What is truly motionless in the Universe? That's a hard one. Currently, we measure all relative movement in astronomy against the Cosmic Background Radiation or the Cosmic Microwave Background. But, we currently believe-- based on the work of Edwin Hubble-- that space itself is expanding. So, there seems to be no absolutely "still" spot in the Universe. Galileo wants to divide the Universe into the moving and the motionless here. But, we now think that there is nothing in the Universe that is motionless.

    8. it is operative only in the relation that they have with other bodies lacking that motion

      If Jane and Mary have a motion that is "common" to both of them, it doesn't matter to them that they are moving. But, if Bob has a different motion, both Jane and Mary think that Bob is moving. It's obvious. But, they might forget the the two of them are both moving. My laptop and I are moving at a breakneck speed as the earth spins on its axis and orbits around the sun all while the sun and the Milk Way Galaxy its in are also moving. But, I don't think about that most days. And, I would say that we are both sitting still in a coffee shop right now and the Mocha sitting next to me is not going to suddenly spill. It has a motion common to me and my laptop. But, if we came across something that was totally still-- we would notice! In fact, I would think, "Wow! That thing is moving FAST!"

    9. Peripatetic

      The Peripatetics were a group of philosophers who thought while walking. Sometimes it is used to refer to traveling philosophers or teachers-- kind of like "visiting professor" today. But, here, the speaker is saying that what SALV has said agrees with Aristotle. That is, " This is good, sound doctrine, and entirely Aristotelian." The Peripatetics were Aristotelian.

    1. I cannot without great astonishment -- I might say without great insult to my intelligence -- hear it attributed as a prime perfection and nobility of the natural and integral bodies of the universe that they are invariant, immutable, inalterable, etc., while on the other hand it is called a great imperfection to be alterable, generable, mutable, etc. For my part I consider the earth very noble and admirable precisely because of the diverse alterations, changes, generations, etc. that occur in it incessantly. If, not being subject to any changes, it were a vast desert of sand or a mountain of jasper, or if at the time of the flood the waters which covered it had frozen, and it had remained an enormous globe of ice where nothing was ever born or ever altered or changed, I should deem it a useless lump in the universe, devoid of activity and, in a word, superfluous and essentially nonexistent. This is exactly the difference between a living animal and a dead one; and I say the same of the moon, of Jupiter, and of all other world globes.

      This is my favorite passage in all of Galileo's writings.

    2. What you refer to is the method he uses in writing his doctrine, but I do not believe it to be that with which he investigated it. Rather, I think it certain that he first obtained it by means of the senses, experiments, and observations, to assure himself as much as possible of his conclusions. Afterward he sought means to make them demonstrable. That is what is done for the most part in the demonstrative sciences; this comes about because when the conclusion is true, one may by making use of analytical methods hit upon some proposition which is already demonstrated, or arrive at some axiomatic principle; but if the conclusion is false, one can go on forever without ever finding any known truth -- if indeed one does not encounter some impossibility or manifest absurdity. And you may be sure that Pythagoras, long before he discovered the proof for which he sacrificed a hecatomb, was sure that the square on the side opposite the right angle in a right triangle was equal to the squares on the other two sides. The certainty of a conclusion assists not a little in the discovery of its proof -- meaning always in the demonstrative sciences. But however Aristotle may have proceeded, whether the reason a priori came before the sense perception a posteriori or the other way round, it is enough that Aristotle, as he said many times, preferred sensible experience to any argument. Besides, the strength of the arguments a priori has already been examined.

      But, here, Galileo may give Aristotle too much credit. Science historians currently see the real lack of new experiments to test a conclusion drawn from observations as the principle difference between the science done by people before the Scientific Revolution and the science done during and after it.

    3. You say that alterations which may be seen near at hand on earth cannot be seen in America because of the great distance. Well, so much the less could they be seen in the moon, which is many hundreds of times more distant.

      Simplicio made the mistake of saying that there aren't any changes because he never saw any. But, he has no means of detecting them! How many of these assumptions are we making today because we haven't invented some new way of measuring our Universe and its many dimensions?

    4. And from this he infers it to be necessary and proper that all simple motions are confined to these three kinds; namely, toward the center, away from the center, and around the center.

      Aristotle might be more right about this than Galileo is-- that is that motion is made up of straight lines. Galileo will make a mistake about "curved motion" to be natural motion. He did not understand-- as we do-- how vector decomposition could explain the parabolic trajectory of a cannonball.

    5. in order to prevent the things they admired from being exposed to the slander and scorn of the common people, the Pythagoreans condemned as sacrilegious the publication of the most hidden properties of numbers or of the incommensurable and irrational quantities which they investigated. They taught that anyone who had revealed them was tormented in the other world.

      Wow! He is taking on Pythagoras and his secret society as well as Aristotle. His Dad took on Pythagoras and his music theories when Galileo was a child and his father was a famous composer.

  20. Dec 2016
    1. Ninety-five percent of 12- to 17-year-olds already go online on a regular basis. They use social networks, and create and contribute to websites. Our work is focused on taking full advantage of the kinds of tools and technologies that have transformed every other aspect of life to power up and accelerate students’ learning. We need to do things differently, not just better.

      Hypothes.is nicely bridges the worlds of social media and formal education.

    1. time intervals long compared to the period of one vibration

      He's saying that you have to look at the experiment for a long time compared to the period of the vibration. The period of the vibration is the frequency. So, it's not hard to look at an experiment much longer than that. Basically, he's saying we would expect there to be a whole bunch of random wavelength/frequency thingies showing up over the time we take a measurement. But, that's not exactly what he found.

    2. E=Cλ−5ec/λT−1
      • E is Energy
      • C is not the speed of light here. It refers to a constant.
      • $$\lambda$$ is always the wavelength
      • the little e is a special irrational number called Euler's Number).
      • And, I'm not honestly sure if it is being raised to c the speed of light or C the constant in question. And, that's OK. Remember-- we don't need to totally digest any of the papers we are reading for this section. You can always go back when you have more information.
    3. const

      Some constant goes here. So far, h is working around with Wien's Law and he's saying that "if you take a special case" you will get to the point where the second derivative (see the 2's in the left hand side of this equation?) of the entropy (he called that S earlier) compared to the vibrational energy (he called that U earlier) is equal to some number divided by the vibrational energy (the U on the right hand side of the equation).

    4. f(Un)

      f(something) is a special notation in math. It looks like it means fsomething. But, it doesn't. It means "an equation where the only thing you have to plug in is the something". And we say that "f is a function of something". So, f(x) means that "f is a function of x". Here is an f(x): xx*x + 3. To know what that is equal to, all you need to know is what x is equal. Here he is saying that there is some equation where you just needed to know U. U above was the vibrational energy. The little n next to the U means that it is the particular vibrational energy for the resonator he was talking about a minute ago. Don't worry about the math other than that. But, there are some \(\bigtriangleup\)'s here. Remember from our "don't look down" lessons that this means the change in something.

    5. the evaluation of an infinitesimal increase

      Infinitesimal is talking about Calculus. Remember that in class we said that Calculus was giving them the wrong answers. When you add up the infinitesimal stuff he is looking at you get something like this: But, what Planck found out was that the energy comes in distinct buckets. So, it would look more like this in reality:

  21. Nov 2016
  22. Oct 2016
    1. Several studies found the decrease in comprehension on digital devices was more due to distractions on the internet than to the medium itself. Perhaps self-control is among the key skills to teach students expected to read more online.

      Distractions as a researched problem, but where is the citation?

  23. Sep 2016
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  27. Mar 2016
    1. Great example of a forum which will cause burnout (for both student and professor). I like the idea for using Twitter as explained below. Students are probably already using the tool, it can be used as a back channel, and it has a more normal flow of conversation with potential guest speakers.

  28. Jan 2016
  29. Dec 2015