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Christopher Lee

Why I Like Prezi - 0 views

blog.pamelafox.org/...why-i-like-prezi.html

prezi powerpoint ppt presentation edtech tools

shared by Christopher Lee on 25 Jul 12 - No Cached
  • Christopher Lee on 25 Jul 12
     
    Why I Like Prezi In my life, I have given a *lot* of presentations. In high school, they were presentations on group projects. In university, they were presentations on research projects. At Google, they're presentations on how to use our APIs. When I first started giving presentations, I used Powerpoint, like everyone else. But I kept thinking there must be a better way, and I experimented with other options - flash interfaces, interactive Javascript apps. Then I discovered Prezi, and it has become my presentation tool of choice. Prezi is an online tool for creating presentations - but it's not just a Powerpoint clone, like the Zoho or Google offering. When you first create a Prezi, you're greeted with a blank canvas and a small toolbox. You can write text, insert images, and draw arrows. You can draw frames (visible or hidden) around bits of content, and then you can define a path from one frame to the next frame. That path is your presentation. It's like being able to draw your thoughts on a whiteboard, and then instructing a camera where to go and what to zoom into. It's a simple idea, but I love it. Here's why: It forces me to "shape" my presentation. A slide deck is always linear in form, with no obvious structure of ideas inside of it. Each of my Prezis has a structure, and each structure is different. The structure is visual, but it supports a conceptual structure. One structure might be 3 main ideas, with rows of ideas for each one. Another might be 1 main idea, with a circular branching of subideas. Having a structure helps me to have more of a point to my presentations, and to realize the core ideas of them. It makes it easy to go from brainstorming stage to presentation stage, all in the same tool. I can write a bunch of thoughts, insert some images, and easily move them around, cluster them, re-order them, etc. I can figure out the structure of my presentation by looking at what I have laid out, and seeing how they fit together. Some people do this
Laura Doto

Final Report: Friendship | DIGITAL YOUTH RESEARCH - 1 views

digitalyouth.ischool.berkeley.edu/book-friendship

Aristotle Friendship teens adolescents online network

shared by Laura Doto on 23 Jun 09 - Cached
  • Social relations—not simply physical space—structure the social worlds of youth.
    • Laura Doto
      Laura Doto on 23 Jun 09
       
      A critical conclusion to be realized that can inform our assumptions as educators.
  • When teens are involved in friendship-driven practices, online and offline are not separate worlds—they are simply different settings in which to gather with friends and peers
  • these dynamics reinforce existing friendship patterns as well as constitute new kinds of social arrangements.
  • ...43 more annotations...
  • Homophily describes the likelihood that people connect to others who share their interests and identity.
  • One survey of Israeli teens suggests that those who develop friendships online tend toward less homogenous connections than teens who do not build such connections
  • Teens frequently use social media as additional channels of communication to get to know classmates and turn acquaintances into friendships.
  • Some teens—especially marginalized and ostracized ones—often relish the opportunity to find connections beyond their schools. Teens who are driven by specific interests that may not be supported by their schools, such as those described in the Creative Production and Gaming chapters, often build relationships with others online through shared practice.
  • there are plenty of teens who relish the opportunity to make new connections through social media, this practice is heavily stigmatized
  • the public myths about online “predators” do not reflect the actual realities of sexual solicitation and risky online behavior (Wolak et al. 2008). Not only do unfounded fears limit teenagers unnecessarily, they also obscure preventable problematic behavior
  • As she described her typical session on Photobucket, it became clear that a shared understanding of friendship and romance was being constructed by her and other Photobucket users:
  • The fact that they draw from all of these sources suggests that youth’s friendship maintenance is in tune with a discourse of love and friendship that is being widely displayed and (re)circulated.
  • “It’s like have you noticed that you may have someone in your Top 8 but you’re not in theirs and you kinda think to yourself that you’re not as important to that person as they are to you . . . and oh, to be in the coveted number-one spot!”
  • Taking someone off your Top 8 is your new passive-aggressive power play when someone pisses you off.
  • Top Friends are persistent, publicly displayed, and easily alterable. This makes it difficult for teens to avoid the issue or make excuses such as “I forgot.” When pressured to include someone, teens often oblige or attempt to ward off this interaction by listing those who list them
  • Other teens avoid this struggle by listing only bands or family members. While teens may get jealous if other peers are listed, family members are exempt from the comparative urge.
  • to avoid social drama with her friends:
  • The Top Friends feature is a good example of how structural aspects of software can force articulations that do not map well to how offline social behavior works.
  • teens have developed a variety of social norms to govern what is and is not appropriate
  • The problem with explicit ranking, however, is that it creates or accentuates hierarchies where they did not exist offline, or were deliberately and strategically ambiguous, thus forcing a new set of social-status negotiations. The give-and-take over these forms of social ranking is an example of how social norms are being negotiated in tandem with the adoption of new technologies, and how peers give ongoing feedback to one another as part of these struggles to develop new cultural standards.
  • While teen dramas are only one component of friendship, they are often made extremely visible by social media. The persistent and networked qualities of social media alter the ways that these dramas play out in teen life. For this reason, it is important to pay special attention to the role that social media play in the negotiation of teen status.
  • primarily a continuation of broader dramas.
  • social media amplify dramas because they extend social worlds beyond the school.
  • Gossip and rumors have played a role in teen struggles for status and attention since well before social media entered the scene
  • social media certainly alter the efficiency and potential scale of interactions. Because of this, there is greater potential for gossip to spread much further and at a faster pace, making social media a culprit in teen drama. While teen gossip predates the Internet, some teens blame the technologies for their roles in making gossip easier and more viral
  • That’s what happened with me and my friends. We got into a lot of drama with it and I was like, anyone can write anything. It can be fact, fiction. Most people, what they read they believe. Even if it’s not true (C.J. Pascoe, Living Digital).
  • finds the News Feed useful “because it helps you to see who’s keeping track of who and who’s talking to who.” She enjoys knowing when two people break up so that she knows why someone is upset or when she should reach out to offer support. Knowing this information also prevents awkward conversations that might reference the new ex. While she loves the ability to keep up with the lives of her peers, she also realizes that this means that “everybody knows your business.”
  • Some teens find the News Feed annoying or irrelevant. Gadil, an Indian 16-year-old from Los Angeles, thinks that it is impersonal while others think it is downright creepy. For Tara, a Vietnamese 16-year-old from Michigan, the News Feed takes what was public and makes it more public: “Facebook’s already public. I think it makes it way too like stalker-ish.” Her 18-year-old sister, Lila, concurs and points out that it gets “rumors going faster.” Kat, a white 14-year-old from Salem, Massachusetts, uses Facebook’s privacy settings to hide stories from the News Feed for the sake of appearances.
  • While gossip is fairly universal among teens, the rumors that are spread can be quite hurtful. Some of this escalates to the level of bullying. We are unable to assess whether or not bullying is on the rise because of social media. Other scholars have found that most teens do not experience Internet-driven harassment (Wolak, Mitchell, and Finkelhor 2007). Those who do may not fit the traditional profile of those who experience school-based bullying (Ybarra, Diener-West, and Leaf 2007), but harassment, both mediated and unmediated, is linked to a myriad of psychosocial issues that includes substance use and school problems (Hinduja and Patchin 2008; Ybarra et al. 2007).
  • Measuring “cyberbullying” or Internet harassment is difficult, in part because both scholars and teens struggle to define it. The teens we interviewed spoke regularly of “drama” or “gossip” or “rumors,” but few used the language of “bullying” or “harassment” unless we introduced these terms. When Sasha, a white 16-year-old from Michigan, was asked specifically about whether or not rumors were bullying, she said: I don’t know, people at school, they don’t realize when they are bullying a lot of the time nowadays because it’s not so much physical anymore. It’s more like you think you’re joking around with someone in school but it’s really hurting them. Like you think it’s a funny inside joke between you two, but it’s really hurtful to them, and you can’t realize it anymore. Sasha, like many of the teens we interviewed, saw rumors as hurtful, but she was not sure if they were bullying. Some teens saw bullying as being about physical harm; others saw it as premeditated, intentionally malicious, and sustained in nature. While all acknowledged that it could take place online, the teens we interviewed thought that most bullying took place offline, even if they talked about how drama was happening online.
  • it did not matter whether it was online or offline; the result was still the same. In handling this, she did not get offline, but she did switch schools and friend groups.
  • Technology provides more channels through which youth can potentially bully one another. That said, most teens we interviewed who discussed being bullied did not focus on the use of technology and did not believe that technology is a significant factor in bullying.
  • They did, though, see rumors, drama, and gossip as pervasive. The distinction may be more connected with language and conception than with practice. Bianca, a white 16-year-old from Michigan, sees drama as being fueled by her peers’ desire to get attention and have something to talk about. She thinks the reason that people create drama is boredom. While drama can be hurtful, many teens see it simply as a part of everyday social life.
  • Although some drama may start out of boredom or entertainment, it is situated in a context where negotiating social relations and school hierarchies is part of everyday life. Teens are dealing daily with sociability and related tensions.
  • Tara thinks that it emerges because some teens do not know how to best negotiate their feelings and the feelings of others.
  • Teens can use the ability to publicly validate one another on social network sites to reaffirm a friendship.
  • So, while drama is common, teens actually spend much more time and effort trying to preserve harmony, reassure friends, and reaffirm relationships. This spirit of reciprocity is common across a wide range of peer-based learning environments we have observed.
  • From this perspective, commenting is not as much about being nice as it is about relying on reciprocity for self-gain
  • That makes them feel like they’re popular, that they’re getting comments all the time by different people, even people that they don’t know. So it makes them feel popular in a way (Rural and Urban Youth).
  • Gossip, drama, bullying, and posing are unavoidable side effects of teens’ everyday negotiations over friendship and peer status. What takes place in this realm resembles much of what took place even before the Internet, but certain features of social media alter the dynamics around these processes. The public, persistent, searchable, and spreadable nature of mediated information affects the way rumors flow and how dramas play out. The explicitness surrounding the display of relationships and online communication can heighten the social stakes and intensity of status negotiation. The scale of this varies, but those who experience mediated harassment are certainly scarred by the process. Further, the ethic of reciprocity embedded in networked publics supports the development of friendships and shared norms, but it also plays into pressures toward conformity and participation in local, school-based peer networks. While there is a dark side to what takes place, teens still relish the friendship opportunities that social media provide.
  • While social warfare and drama do exist, the value of social media rests in their ability to strengthen connections. Teens leverage social media for a variety of practices that are familiar elements of teen life: gossiping, flirting, joking around, and hanging out. Although the underlying practices are quite familiar, the networked, public nature of online communication does inflect these practices in new ways.
  • Adults’ efforts to regulate youth access to MySpace are the latest example of how adults are working to hold on to authority over teen socialization in the face of a gradual erosion of parental influence during the teen years.
  • learning how to manage the unique affordances of networked sociality can help teens navigate future collegiate and professional spheres where mediated interactions are assumed.
  • articulating those friendships online means that they become subject to public scrutiny in new ways;
  • This makes lessons about social life (both the failures and successes) more consequential and persistent
  • make these dynamics visible in a more persistent and accessible public arena.
  • co-constructing new sets of social norms together with their peers and the efforts of technology developers. The dynamics of social reciprocity and negotiations over popularity and status are all being supported by participation in publics of the networked variety as formative influences in teen life. While we see no indication that social media are changing the fundamental nature of these friendship practices, we do see differences in the intensity of engagement among peers, and conversely, in the relative alienation of parents and teachers from these social worlds.
  • Laura Doto on 23 Jun 09
     
    MacArthur Foundation Study - Friendship chapter
Misha Miller

Using Groups Effectively: 10 Principles » Edurati Review - 50 views

eduratireview.com/...oups-effectively-10-principles

collaboration groups pedagogy

shared by Misha Miller on 20 May 13 - No Cached
  • Misha Miller on 20 May 13
     
    "Conversation is key . Sawyer succinctly explains this principle: "Conversation leads to flow, and flow leads to creativity." When having students work in groups, consider what will spark rich conversation. The original researcher on flow, Mihaly Csikszentmihalyi, found that rich conversation precedes and ignites flow more than any other activity.1 Tasks that require (or force) interaction lead to richer collaborative conceptualization. Set a clear but open-ended goal . Groups produce the richest ideas when they have a goal that will focus their interaction but also has fluid enough boundaries to allow for creativity. This is a challenge we often overlook. As teachers, we often have an idea of what a group's final product should look like (or sound like, or…). If we put students into groups to produce a predetermined outcome, we prevent creative thinking from finding an entry point. Try not announcing time limits. As teachers we often use a time limit as a "motivator" that we hope will keep group work focused. In reality, this may be a major detractor from quality group work. Deadlines, according to Sawyer, tend to impede flow and produce lower quality results. Groups produce their best work in low-pressure situations. Without a need to "keep one eye on the clock," the group's focus can be fully given to the task. Do not appoint a group "leader." In research studies, supervisors, or group leaders, tend to subvert flow unless they participate as an equal, listening and allowing the group's thoughts and decisions to guide the interaction. Keep it small. Groups with the minimum number of members that are needed to accomplish a task are more efficient and effective. Consider weaving together individual and group work. For additive tasks-tasks in whicha group is expectedtoproduce a list, adding one idea to another-research suggests that better results develop
Christophe Gigon

elearnspace. Connectivism: A Learning Theory for the Digital Age - 17 views

www.elearnspace.org/...connectivism.htm

connectivism MEMOIRE learning elearning theory collaboration technology community

shared by Christophe Gigon on 09 Dec 08 - Cached
  • Over the last twenty years, technology has reorganized how we live, how we communicate, and how we learn.
    • Rose Molter
      Rose Molter on 30 Aug 11
       
      I aggree that as teachers we need to realize that technology has changed instruction and the way that our students learn and the way that we learn and instruct.
    • Orlando Gonzalez
      Orlando Gonzalez on 13 Mar 12
       
      Technology has always changed the way we live. How did we respond to changes in the past? One thought is that some institutions, some businesses disappeared, while others, who took advantage of the new tech, appeared to replace the old. It will happen again and we as educators need to lead the way.
    • Maureen Curran
      Maureen Curran on 24 Mar 12
       
      With technology our students brains are wired differently and they can multi-task and learn in multiple virtual environments all at once. This should make us think about how we present lessons, structure learning and keep kids engaged.
    • Mike Burnett
      Mike Burnett on 18 Aug 14
       
      Rubbish. The idea that digital native are adept at multitasking is wrong. They may be doing many things but the quality and depth is reduced. There is a significant body of research to support this. Development of grit and determination are key attributes of successful people. Set and demand high standards. No one plays sport or an instrument because it is easy rather because they can clearly see a link between hard work and pleasure.
  • Information development was slow.
  • Many learners will move into a variety of different, possibly unrelated fields over the course of their lifetime.
  • ...41 more annotations...
  • Informal learning is a significant aspect of our learning experience.
  • Learning is a continual process, lasting for a lifetime.
  • Technology is altering (rewiring) our brains.
  • Connectivism is the integration of principles explored by chaos, network, and complexity and self-organization theories.
  • Principles of connectivism:
  • Learning and knowledge rests in diversity of opinions. Learning is a process of connecting specialized nodes or information sources. Learning may reside in non-human appliances. Capacity to know more is more critical than what is currently known Nurturing and maintaining connections is needed to facilitate continual learning. Ability to see connections between fields, ideas, and concepts is a core skill. Currency (accurate, up-to-date knowledge) is the intent of all connectivist learning activities. Decision-making is itself a learning process. Choosing what to learn and the meaning of incoming information is seen through the lens of a shifting reality. While there is a right answer now, it may be wrong tomorrow due to alterations in the information climate affecting the decision.
    • Rose Molter
      Rose Molter on 30 Aug 11
       
      I think it is important for us to realize the importance of connections.
  • The organization and the individual are both learning organisms.
  • Classrooms which emulate the “fuzziness”
    • Maureen Curran
      Maureen Curran on 24 Mar 12
       
      So what does this look like? I feel that when I attempt this, evaluators and administrators don't necessarily understand. They want a neat, quiet, well-managed, orderly classroom.
    • Maureen Curran
      Maureen Curran on 24 Mar 12
       
      If new learning approaches are required, then why are we still being evaluated in a linear way?
  • John Seely Brown presents an interesting notion that the internet leverages the small efforts of many with the large efforts of few.
  • The pipe is more important than the content within the pipe. Our ability to learn what we need for tomorrow is more important than what we know today.
  • Knowledge is growing exponentially
  • amount of knowledge
  • is doubling every 18 months
  • To combat the shrinking half-life of knowledge, organizations have been forced to develop new methods of deploying instruction.”
  • (the understanding of where to find knowledge needed).
  • know-where
  • learning
  • a persisting change in human performance or performance potential…[which] must come about as a result of the learner’s experience and interaction with the world”
  • Learning theories are concerned with the actual process of learning, not with the value of what is being learned.
  • The ability to synthesize and recognize connections and patterns is a valuable skill.
  • knowledge is no longer acquired in the linear manner
  • What is the impact of chaos as a complex pattern recognition process on learning
  • An entirely new approach is needed.
  • Chaos is the breakdown of predictability, evidenced in complicated arrangements that initially defy order.
  • Meaning-making and forming connections between specialized communities are important activities.
  • Chaos, as a science, recognizes the connection of everything to everything.
  • If the underlying conditions used to make decisions change, the decision itself is no longer as correct as it was at the time it was made.
  • principle that people, groups, systems, nodes, entities can be connected to create an integrated whole.
  • Connections between disparate ideas and fields can create new innovations.
  • Learning is a process that occurs within nebulous environments of shifting core elements – not entirely under the control of the individual
  • decisions are based on rapidly altering foundations
  • The ability to draw distinctions between important and unimportant information is vital.
  • Behaviorism, cognitivism, and constructivism do not attempt to address the challenges of organizational knowledge and transference.
  • The health of the learning ecology of the organization depends on effective nurturing of information flow.
  • This cycle of knowledge development (personal to network to organization) allows learners to remain current in their field through the connections they have formed.
  • This amplification of learning, knowledge and understanding through the extension of a personal network is the epitome of connectivism.
  • Diverse teams of varying viewpoints are a critical structure for completely exploring ideas
  • An organizations ability to foster, nurture, and synthesize the impacts of varying views of information is critical to knowledge economy surviva
  • As knowledge continues to grow and evolve, access to what is needed is more important than what the learner currently possesses.
    • BalancEd Tech
      BalancEd Tech on 25 Mar 12
       
      Access is not enough. Prior knowledge and understanding is needed. Processing is needed. Evaluation of processing and outputs is needed. Feeding that back into the "system" is needed.
  • learning is no longer an internal, individualistic activity
  • learning is no longer an internal, individualistic activity
Kate Pok

Intersections: History and New Media: Wiki in the History Classroom - 5 views

www.historians.org/...0905for11.cfm

collaborative writing writing pedagogy new media wiki classroom

shared by Kate Pok on 18 Jan 13 - No Cached
  • Students did not agree on the merits of the wiki. Some were deeply offended when other students eliminated or modified their contributions. Others found the chance to pick apart other’s words and conclusions exhilarating. Regardless, most students seemed to grasp the important lesson I hoped to share: that history is the conversation we have about the past. History is about the authorial choices scholars make. History is about the evidence included and the evidence excluded. By asking students to participate in a joint-writing exercise, they were compelled to pay attention to the language others used, the phrasings and structure employed, the anecdotes emphasized, the facts obscured. I told them the story of an undergraduate English professor I had who spent an entire class session discussing why Shakespeare began Macbeth with the word “when”. Words matter. Words shape arguments. They determine meaning, and they form our view of the world around us, including our view of the history of the world around us. Students also came to appreciate that history was not a bag of facts we historians force them to memorize. Instead, as Appleby, Hunt, and Jacob suggest, history is the product of that collective effort of truth seeking.
  • I still caution students about using Wikipedia. But I think the wiki can help our students see themselves as part of that democratic conversation so important to our profession. Throwing their ideas into the ring for others to challenge forces students to defend their ideas, modify their conclusions, and reconsider their assumptions. The wiki, while not perfect, may help us change the way our students think about history. It may help them be more attentive to language and argument. Importantly, it may help them value civil discourse as a civic virtue. These are good lessons for history students and for their professors. —Kevin B. Sheets is associate professor of history at the State University of New York, College at Cortland and project director of the “American Dream Project,” a Teaching American History grant-based project in upstate New York. He regularly teaches courses in historical methods and American intellectual and cultural history.
  • Kate Pok on 18 Jan 13
     
    Great description of the merits of using a wiki in a classroom.
Gareth Jones

Looking in the Wrong Places | Edge.org - 5 views

www.edge.org/...er-looking-in-the-wrong-places

NaturalScience senseperception paradigm

shared by Gareth Jones on 19 May 18 - No Cached
  • We should be very careful in thinking about whether we’re working on the right problems. If we don’t, that ties into the problem that we don’t have experimental evidence that could move us forward. We're trying to develop theories that we use to find out which are good experiments to make, and these are the experiments that we build.   We build particle detectors and try to find dark matter; we build larger colliders in the hope of producing new particles; we shoot satellites into orbit and try to look back into the early universe, and we do that because we hope there’s something new to find there. We think there is because we have some idea from the theories that we’ve been working on that this would be something good to probe. If we are working with the wrong theories, we are making the wrong extrapolations, we have the wrong expectations, we make the wrong experiments, and then we don’t get any new data. We have no guidance to develop these theories. So, it’s a chicken and egg problem. We have to break the cycle. I don’t have a miracle cure to these problems. These are hard problems. It’s not clear what a good theory is to develop. I’m not any wiser than all the other 20,000 people in the field.
  • I’m still asking myself the same question that I asked myself ten years ago: "What is going on in my community?" I work in the foundations of physics, and I see a lot of strange things happening there. When I look at the papers that are being published, many of them seem to be produced simply because papers have to be produced. They don’t move us forward in any significant way. I get the impression that people are working on them not so much because it’s what they’re interested in but because they have to produce outcomes in a short amount of time. They sit on short-term positions and have short-term contracts, and papers must be produced.
  • The field that I mostly work in is the foundations of physics, which is, roughly speaking, composed of cosmology, the foundations of quantum mechanics, high-energy particle physics, and quantum gravity. It’s a peculiar field because there hasn’t been new data for almost four decades, since we established the Standard Model of particle physics. There has been, of course, the Higgs particle that was discovered at the LHC in 2012, and there have been some additions to the Standard Model, but there has not been a great new paradigm change, as Kuhn would have put it. We’re still using the same techniques, and we’re still working with the same theories as we did in the 1970s.
  • ...10 more annotations...
  • That makes this field of science rather peculiar and probably explains why there hasn’t been much progress. But it’s not like we don’t have any questions that need to be answered. There are a lot of questions that have been around for decades. For example, what is dark energy? What is dark matter? What are the masses of the Standard Model particles? And what’s up with the foundation of quantum mechanics? Is a theory that's fundamentally not deterministic, where we cannot predict outcomes, the last word that we have, or is there something more to it? Is there maybe another underlying structure to reality?
  • but we haven't reached the fundamental level. Maybe we will never reach it. Certainly, the theories that we have right now are not all there is. The question is, of course, if we don’t have any guidance by experiment, how do we make progress? And are we doing the right thing?
  • We’ve reached this point where we have to carefully rethink if the criteria that we’re using to select our theories are promising at all. If one looks at the history of this field in the foundations of physics, progress has usually been made by looking at questions that, at least in hindsight, were well posed, where there was an actual mathematical contradiction. For example, special relativity is incompatible with Newtonian gravity. If you try to resolve this incompatibility, you get general relativity.
  • There are various similar examples where such breakthroughs have happened because there was a real problem. There was an inconsistency and people had to resolve it. It had nothing to do with beauty. Maybe beauty was, in some cases, the personal motivation of the people to work on it. There’s certainly some truth to this, but I don’t think it’s good to turn this story around and say that if we only pay attention to this motivation that comes from ideals of beauty it will lead to progress.
  • If we are working with the wrong theories, we are making the wrong extrapolations, we have the wrong expectations, we make the wrong experiments, and then we don’t get any new data. We have no guidance to develop these theories. So, it’s a chicken and egg problem. We have to break the cycle. I don’t have a miracle cure to these problems. These are hard problems. It’s not clear what a good theory is to develop. I’m not any wiser than all the other 20,000 people in the field.
  • The way that research is funded in foundations of physics and in many other fields just puts a lot of things at a disadvantage that are not pursued anymore. Typically, everything that takes longer than three years to complete, no one will start it because they can’t afford it. They can literally not afford it.
  • Who makes the decisions about the funding? Superficially, people say that it's a funding agency, so it’s the university who get to hire people. But that puts the blame on the wrong party. In the end it’s the community itself who makes the decisions. What do the funding agencies do if they get a proposal? They send it to reviewers. And who are the reviewers? They're people from the same community. If you look at how hiring decisions are being made, there’s some committee and they are people from the same community. They have some advisory boards or something, which contains people from the same community.
  • Even if that wasn’t so, what the people in these committees would be doing is looking at easy measures for scientific success. Presently, the most popular of these measures are the number of publications and the number of citations. And maybe also whether the person has published in high-impact journals. So, these are the typical measures that are presently being used. But what do they measure? They primarily measure popularity. They indicate whether somebody’s research is well received by a lot of people in the same community. And that’s why once a research area grows beyond a certain critical mass, you have sufficiently many people who tell each other that what they’re doing is the good thing to do. They review each other’s papers and say that that’s great and it's what we should continue to do. It’s a problem in all communities that grow beyond a certain size.
  • I later came to the United States and then Canada, and that gave me the opportunity to learn a lot about quantum gravity. I also figured out that much of what goes on in quantum gravity is very detached from reality. It’s pretty much only mathematics. Yes, the mathematics is there, but I still don’t know if it’s the mathematics that describes reality.
  • That’s the very reason why we don’t normally think of gravity as a weak force. It’s the only force that is left over on long distances, and the reason for this is that it adds up. It gets stronger the more mass you pile up. More precisely, we should say that the reason we find it so hard to measure quantum gravitational effects is that we either have a particle that has very pronounced quantum properties, like, say, a single electron or something like that, but then it’s so light that we cannot measure the gravitational field. Or we have some object that is so heavy that we can measure the gravitational field, but then it doesn’t have quantum properties. Okay, so that’s the actual problem.
Sreedharen Sasidharen

Magnet - Wikipedia, the free encyclopedia - 11 views

en.wikipedia.org/Magnet

shared by Sreedharen Sasidharen on 06 Apr 15 - Cached
    • Sreedharen Sasidharen
      Sreedharen Sasidharen on 06 Apr 15
       
      What is it?
  • A magnet (from Greek μαγνήτις λίθος magnḗtis líthos, "Magnesian stone") is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.
  • Ferromagnetic materials can be divided into magnetically "soft" materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically "hard" materials, which do. Permanent magnets are made from "hard" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a powerful magnetic field during manufacture, to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. "Hard" materials have high coercivity, whereas "soft" materials have low coercivity.
Gregory Louie

Students tap into technology - Pittsburgh Tribune-Review - 1 views

www.pittsburghlive.com/...s_612698.html

shared by Gregory Louie on 23 Feb 09 - Cached
  • use their laptops to read "Don Quixote" and Dante's "Divine Comedy" on the Internet
  • Technology is the wave of the future
  • a computer program
  • ...7 more annotations...
  • "Most jobs require computers," noted Brittnee Stephen, 16, as she assembled a slideshow on her HP Mini laptop. "It's good that we're learning it now."
    • Ed Webb
      Ed Webb on 23 Feb 09
       
      The technology is still very visible, if students are talking in terms of 'computers' rather than the skills involved. We don't talk about 'paper' but writing, critical reading etc. Yet here the platform itself is emphasized. Early days, I guess.
  • has just begun incorporating technology
    • Ed Webb
      Ed Webb on 23 Feb 09
       
      Uh, no. They have been using 'technology' forever, in the form of, say, books.
  • students seem far more interested in learning via interactive technology than they had been with a chalkboard and an overhead projector
    • Ed Webb
      Ed Webb on 23 Feb 09
       
      Well, the problem here is that some of that can be ascribed to novelty. Once every class uses 'interactive technology' (yuk) then how much difference will there be? The tools are great. All tools can be useful. But focus on the pedagogy, people!
    • Scott Merrick
      Scott Merrick on 25 Feb 09
       
      I'm for focusing on understanding. I love the word "pedagogy" because most lay people don't really know what it entails--theory (which can be anything institutional or community deems effective or correct), practice (which, as we know, can be summed up with the phrase "mileage will vary"), and some third thing which if I could come up with it I'd have the magic 3 elements in an effective argument. I think effective tools used effectively by effective teachers (there! 3 uses of one adjective!) will remain effective as long as they are used to promote understanding. No argument here, Ed, just sayin'...
    • Ed Webb
      Ed Webb on 26 Feb 09
       
      Perhaps the magic third thing would be 'attitude' or 'state of mind'? Alternatively, perhaps another of those non-transparent terms, 'praxis'. The point I was trying to make, of course, was that it ain't what you use, it's the way that you use it.
  • "I think the kids that have turned school off because it's boring to them will come here and see something familiar,"
    • Ed Webb
      Ed Webb on 23 Feb 09
       
      Boring and familiar seem to me to be closely related, not opposites. I suspect that often when students say their learning environment is 'boring' they mean 'challenging'.
  • Educational technology does not come cheaply
    • Ed Webb
      Ed Webb on 23 Feb 09
       
      The cost of books is astronomical!
  • "Learning is changing,"
    • Ed Webb
      Ed Webb on 23 Feb 09
       
      Was it EVER the case that we could "just deliver a lecture and expect all the kids to get it"?
    • Gregory Louie
      Gregory Louie on 26 Feb 09
       
      Computer technology in my classroom has revolutionized my teaching of biology. Instead of static images on a printed page, or talk and chalk, my students can manipulate 3-D images of DNA, RNA and proteins. These have even been embedded in a research-based learning progression that leads the students to a robust understanding of the foundational elements of molecular literacy. 1. Atoms and molecules are constantly in motion. (A visualization is not possible on a 2-3 printed page.) 2. All atoms and molecules have a 3-D structure that determines how they interact with other particles. 3. Charges and other intermolecular forces play a role in atomic and molecular interactions. My students can see these for themselves, change the number of particles in a box, or the distribution of charge on a large particle or the temperature of the box and other thought experiments which they can follow in real-time. There is no way, I could do that without the computer!
Michele Brown

The National Networker (TNNW) Blog: BEYOND THE CUBICLE - CORPORATE CULTURE: T... - 9 views

thenationalnetworker.blogspot.com/...cubicle-corporate-culture.html

twitter texting facebook literacy socialmedia

shared by Michele Brown on 08 Feb 10 - Cached
  • The culture appears to be grounded in not only a need to share, but also a desire to be recognized. Retweets – when someone sends your tweet (message) out to their followers (a term supporting the need for recognition) somehow elevates your status within this community.
  • Social Media as a dominant force for communicating has penetrated every element of society. Can a virtual community possess a culture? Every company and organization possesses a definable culture. Behaviors, decision-making models, intrinsic and extrinsic actions and how people are treated may all play a part in defining it. These elements of culture are measureable and easy to define within a controlled entity. Social media lives and breathes in a virtual reality. It permeates all corners of the world, allows people to communicate across all traditional boundaries and thrives 24 hours/day. So…does it have a definable culture? If you have spent any time on Twitter, you quickly realize thousands of people have a need to respond to the question, “What’s happening?” Twitter has developed it’s own language with tweets, retweets, tweeple, twitpics, twibes, etc. You can follow topics with a hashtag and people with lists. What is most apparent is the need people have to share. The culture appears to be grounded in not only a need to share, but also a desire to be recognized. Retweets – when someone sends your tweet (message) out to their followers (a term supporting the need for recognition) somehow elevates your status within this community. There are etiquette protocols as many people publicly thank you for following them and for retweeting. Retweeting becomes a type
  • As you get deeper into the structure of Twitter, you can join a twibe or tweeple group, which provides inclusion – another indication that the need for recognition is systemic.
  • ...2 more annotations...
  • Social media lives and breathes in a virtual reality. It permeates all corners of the world, allows people to communicate across all traditional boundaries and thrives 24 hours/day. So…does it have a definable culture?
  • The culture appears to be grounded in not only a need to share, but also a desire to be recognized. Retweets – when someone sends your tweet (message) out to their followers (a term supporting the need for recognition) somehow elevates your status within this community.
M Holthouse

eGFI - For Teachers » Lesson: Concrete for Kids - 36 views

teachers.egfi-k12.org/concrete-for-kids-2

engineering structures forces

shared by M Holthouse on 06 Sep 11 - No Cached
  • M Holthouse on 06 Sep 11
     
    hands-on project for experimenting with concrete
James Spagnoletti

Göbekli Tepe - Pictures, More From National Geographic Magazine - 67 views

ngm.nationalgeographic.com/...1

religion history anthropology WHAP

shared by James Spagnoletti on 17 Sep 11 - No Cached
Ruth Howard liked it
  • The Birth of ReligionWe used to think agriculture gave rise to cities and later to writing, art, and religion. Now the world’s oldest temple suggests the urge to worship sparked civilization.
  • Before them are dozens of massive stone pillars arranged into a set of rings, one mashed up against the next. Known as Göbekli Tepe (pronounced Guh-behk-LEE TEH-peh), the site is vaguely reminiscent of Stonehenge, except that Göbekli Tepe was built much earlier and is made not from roughly hewn blocks but from cleanly carved limestone pillars splashed with bas-reliefs of animals—a cavalcade of gazelles, snakes, foxes, scorpions, and ferocious wild boars. The assemblage was built some 11,600 years ago, seven millennia before the Great Pyramid of Giza. It contains the oldest known temple. Indeed, Göbekli Tepe is the oldest known example of monumental architecture—the first structure human beings put together that was bigger and more complicated than a hut. When these pillars were erected, so far as we know, nothing of comparable scale existed in the world.
  • At the time of Göbekli Tepe's construction much of the human race lived in small nomadic bands that survived by foraging for plants and hunting wild animals. Construction of the site would have required more people coming together in one place than had likely occurred before. Amazingly, the temple's builders were able to cut, shape, and transport 16-ton stones hundreds of feet despite having no wheels or beasts of burden. The pilgrims who came to Göbekli Tepe lived in a world without writing, metal, or pottery; to those approaching the temple from below, its pillars must have loomed overhead like rigid giants, the animals on the stones shivering in the firelight—emissaries from a spiritual world that the human mind may have only begun to envision.
  • ...15 more annotations...
  • Archaeologists are still excavating Göbekli Tepe and debating its meaning. What they do know is that the site is the most significant in a volley of unexpected findings that have overturned earlier ideas about our species' deep past. Just 20 years ago most researchers believed they knew the time, place, and rough sequence of the Neolithic Revolution—the critical transition that resulted in the birth of agriculture, taking Homo sapiens from scattered groups of hunter-gatherers to farming villages and from there to technologically sophisticated societies with great temples and towers and kings and priests who directed the labor of their subjects and recorded their feats in written form. But in recent years multiple new discoveries, Göbekli Tepe preeminent among them, have begun forcing archaeologists to reconsider. At first the Neolithic Revolution was viewed as a single event—a sudden flash of genius—that occurred in a single location, Mesopotamia, between the Tigris and Euphrates Rivers in what is now southern Iraq, then spread to India, Europe, and beyond. Most archaeologists believed this sudden blossoming of civilization was driven largely by environmental changes: a gradual warming as the Ice Age ended that allowed some people to begin cultivating plants and herding animals in abundance. The new research suggests that the "revolution" was actually carried out by many hands across a huge area and over thousands of years. And it may have been driven not by the environment but by something else entirely.
  • Most of the world's great religious centers, past and present, have been destinations for pilgrimages
  • Göbekli Tepe may be the first of all of them, the beginning of a pattern. What it suggests, at least to the archaeologists working there, is that the human sense of the sacred—and the human love of a good spectacle—may have given rise to civilization itself.
  • n the 1960s archaeologists from the University of Chicago had surveyed the region and concluded that Göbekli Tepe was of little interest. Disturbance was evident at the top of the hill, but they attributed it to the activities of a Byzantine-era military outpo
  • To Schmidt, the T-shaped pillars are stylized human beings, an idea bolstered by the carved arms that angle from the "shoulders" of some pillars, hands reaching toward their loincloth-draped bellies. The stones face the center of the circle—as at "a meeting or dance," Schmidt says—a representation, perhaps, of a religious ritual. As for the prancing, leaping animals on the figures, he noted that they are mostly deadly creatures: stinging scorpions, charging boars, ferocious lions. The figures represented by the pillars may be guarded by them, or appeasing them, or incorporating them as totems.
  • nches below the surface the team struck an elaborately fashioned stone. Then another, and another—a ring of standing pillars.
  • Geomagnetic surveys in 2003 revealed at least 20 rings piled together, higgledy-piggledy, under the earth.
  • he pillars were big—the tallest are 18 feet in height and weigh 16 tons. Swarming over their surfaces was a menagerie of animal bas-reliefs, each in a different style, some roughly rendered, a few as refined and symbolic as Byzantine art.
  • The circles follow a common design. All are made from limestone pillars shaped like giant spikes or capital T's.
  • They hadn't yet mastered engineering." Knoll speculated that the pillars may have been propped up, perhaps by wooden posts.
  • Within minutes of getting there," Schmidt says, he realized that he was looking at a place where scores or even hundreds of people had worked in millennia past.
  • Puzzle piled upon puzzle as the excavation continued. For reasons yet unknown, the rings at Göbekli Tepe seem to have regularly lost their power, or at least their charm. Every few decades people buried the pillars and put up new stones—a second, smaller ring, inside the first.
  • he site may have been built, filled in, and built again for centuries.
  • Bewilderingly, the people at Göbekli Tepe got steadily worse at temple building.
  • Finally the effort seems to have petered out altogether by 8200 B.C. Göbekli Tepe was all fall and no rise.
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