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anorred79

Speaker Lab - 29 views

cse.ssl.berkeley.edu/...speakerlab.html

lab speaker science physical

shared by anorred79 on 06 Oct 14 - No Cached
  • A speaker is a device that converts an electronic signal into sound. The speaker you will build (see figure 1) consists of a Styrofoam or paper cup, a coil of wire, a permanent magnet, and a signal source. The electronic signal goes through the coil and creates a varying electromagnet. The attraction and repulsion between the electromagnet and the permanent magnet cause the cup to vibrate and produce sound.
    • anorred79
      anorred79 on 06 Oct 14
       
      Student should work in groups of 2 to 3.
Dallas McPheeters

Intel: Light beams can replace electronic signals for future computers - SmartPlanet - 12 views

www.smartplanet.com/...9370

shared by Dallas McPheeters on 28 Jul 10 - Cached
  • Here’s how it works, step by step: The transmitter chip is made of four hybrid silicon lasers. Light beams from the lasers each travel into an optical modulator. The modulator encodes data onto the beams at 12.5Gbps. The four beams are then combined and output to a single optical fiber, for a total data rate of 50Gbps. At the other end of the link, the receiver chip separates the four optical beams and directs them into photo detectors. The photo detectors convert data back into electrical signals.
    • Dallas McPheeters
      Dallas McPheeters on 28 Jul 10
       
      The future of fast computing using laser light to transfer data 50Gb/second.
  • a video explanation:
  • “silicon photonics,”
    • Dallas McPheeters
      Dallas McPheeters on 28 Jul 10
       
      Silicon Photonics making 1Tb/sec goal of data transfer affordable and within reach of mass consumer markets. Two videos here explain how it works in less than 2 mins each.
Paul Beaufait

The purpose of aggregating bookmarks for the Diigo in Education group - 144 views

As somewhat of a Johnny-come-lately to this group, since hearing of new Diigo outline functionality AND planned deprecation of Diigo lists, I believed this group would focus on the transition in Di...

aggregations Diigo education groups purposes moderation noise-to-signal signal-to-noise tools

started by Paul Beaufait on 23 Mar 15 7 follow-ups, last by Paul Beaufait on 06 Apr 15
Roland Gesthuizen

iOS Apps for Science Teachers : Teaching about Sound - 3 views

www.whiteboardblog.co.uk/...-apps-for-teaching-about-sound

sound apps science Physics noise iOS

shared by Roland Gesthuizen on 11 Feb 13 - No Cached
  • Roland Gesthuizen on 11 Feb 13
     
    "Teaching about sound in the classroom used to involve lots of fiddly bits of kit such as Signal Generators and Decibel Meters that would cost a lot of money and only get wheeled out once a year. Thankfully if you have an iPhone or iPad you can replace quite a bit of that kit with a couple of handy apps which are either free or relatively inexpensive. Here's a couple to get you started:"
Martin Burrett

Evidence of changes to children's brain rhythms following 'brain training' - 17 views

ukedchat.com/...ythms-following-brain-training

brain brain games research

shared by Martin Burrett on 26 Aug 16 - No Cached
  • Martin Burrett on 26 Aug 16
     
    New research questions the strong claims that have been made about the benefits of 'brain training' - enhanced mental skills, a boost to education, improved clinical outcomes and sharper everyday functioning. This new study found evidence that 'brain training' changed brain signalling but no indication of other benefits...
Kenuvis Romero

Memory - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Memory

shared by Kenuvis Romero on 23 Jun 13 - No Cached
  • Encoding of working memory involves the spiking of individual neurons induced by sensory input, which persists even after the sensory input disappears (Jensen and Lisman 2005; Fransen et al. 2002). Encoding of episodic memory involves persistent changes in molecular structures that alter synaptic transmission between neurons. Examples of such structural changes include long-term potentiation (LTP) or spike-timing-dependent plasticity (STDP). The persistent spiking in working memory can enhance the synaptic and cellular changes in the encoding of episodic memory (Jensen and Lisman 2005).
  • Recent functional imaging studies detected working memory signals in both medial temporal lobe (MTL), a brain area strongly associated with long-term memory, and prefrontal cortex (Ranganath et al. 2005), suggesting a strong relationship between working memory and long-term memory. However, the substantially more working memory signals seen in the prefrontal lobe suggest that this area play a more important role in working memory than MTL (Suzuki 2007).
  • Consolidation and reconsolidation. Short-term memory (STM) is temporary and subject to disruption, while long-term memory (LTM), once consolidated, is persistent and stable. Consolidation of STM into LTM at the molecular level presumably involves two processes: synaptic consolidation and system consolidation. The former involves a protein synthesis process in the medial temporal lobe (MTL), whereas the latter transforms the MTL-dependent memory into an MTL-independent memory over months to years (Ledoux 2007). In recent years, such traditional consolidation dogma has been re-evaluated as a result of the studies on reconsolidation. These studies showed that prevention after retrieval affects subsequent retrieval of the memory (Sara 2000). New studies have shown that post-retrieval treatment with protein synthesis inhibitors and many other compounds can lead to an amnestic state (Nadel et al. 2000b; Alberini 2005; Dudai 2006). These findings on reconsolidation fit with the behavioral evidence that retrieved memory is not a carbon copy of the initial experiences, and memories are updated during retrieval.
  • ...4 more annotations...
  • Physical exercise, particularly continuous aerobic exercises such as running, cycling and swimming, has many cognitive benefits and effects on the brain. Influences on the brain include increases in neurotransmitter levels, improved oxygen and nutrient delivery, and increased neurogenesis in the hippocampus. The effects of exercise on memory have important implications for improving children's academic performance, maintaining mental abilities in old age, and the prevention and potential cure of neurological diseases.
  • At the Center for Cognitive Science at Ohio State University, researchers have found that memory accuracy of adults is hurt by the fact that they know more, and have more experience than children, and tend to apply all this knowledge when learning new information. The findings appeared in the August 2004 edition of the journal Psychological Science.
  • Interference can hamper memorization and retrieval. There is retroactive interference, when learning new information makes it harder to recall old information[59] and proactive interference, where prior learning disrupts recall of new information. Although interference can lead to forgetting, it is important to keep in mind that there are situations when old information can facilitate learning of new information. Knowing Latin, for instance, can help an individual learn a related language such as French – this phenomenon is known as positive transfer.[60]
  • Methods to optimize memorization[edit] Memorization is a method of learning that allows an individual to recall information verbatim. Rote learning is the method most often used. Methods of memorizing things have been the subject of much discussion over the years with some writers, such as Cosmos Rossellius using visual alphabets. The spacing effect shows that an individual is more likely to remember a list of items when rehearsal is spaced over an extended period of time. In contrast to this is cramming which is intensive memorization in a short period of time. Also relevant is the Zeigarnik effect which states that people remember uncompleted or interrupted tasks better than completed ones. The so-called Method of loci uses spatial memory to memorize non-spatial information.[72]
Roland Gesthuizen

Pathfinders for Autism | Articles - 17 views

www.pathfindersforautism.org/...-for-autism-spectrum-disorders

autism education pedagogy teaching

shared by Roland Gesthuizen on 06 Nov 13 - No Cached
  • Roland Gesthuizen on 06 Nov 13
     
    "Autism can block, delay, or distort signals from any or all of the senses. It is difficult for people with autism to interact with other people through social activities and spoken communication. Pragmatic language skills, including gestures, facial expressions, body language, and other nonverbal communication, may also be impaired. Autism may also be associated with difficulties with learning, imagination, and reasoning. "
Dallas McPheeters

Newly Discovered Protein Function Linked to Breast Cancer | UANews.org - 9 views

uanews.org/32793

protein discovered ua cell chemistry genetics warfare organics

shared by Dallas McPheeters on 13 Jul 10 - Cached
  • he researchers report their findings in the advance online publication of the Nature Cell Biology July issue. The cells in our bodies constantly sense their environment and respond appropriately. For example, if pathogens invade the body, cells will respond by generating an inflammatory environment to fight the pathogen. This is achieved by intricate molecular circuits within cells that sense and relay external signals and orchestrate the cellular response. Aberrant functioning of these cellular switch boards can lead to diseases including autoimmune disorders and cancer. In the study, an the scientists set out to better understand the molecular workings underlying inflammation. Inflammation, the body's primary line of defense against disease-causing microbes and parasites, is a highly complex and tightly regulated biochemical process involving a myriad of specialized cells communicating with each other through an arsenal of signaling molecules.
    • Dallas McPheeters
      Dallas McPheeters on 13 Jul 10
       
      Excellent explanation of how cells communicate in the human body.
Rob Alexander

The American Conservative » Return of the War Party - 0 views

www.amconmag.com/...return-of-the-war-party

Iran Israel neoconservatives neocons war

shared by Rob Alexander on 27 Feb 09 - Cached
  • Rob Alexander on 27 Feb 09
     
    Before we let ourselves be stampeded into another unnecessary war, let us review a few facts that seem to contradict the war propaganda. First, last week's acknowledgment that Iran has enough enriched uranium for one atom bomb does not mean Iran is building an atom bomb. To construct a nuclear device, the ton of low-enriched uranium at Natanz would have to be run through a second cascade of high-speed centrifuges to produce 55 pounds of highly enriched uranium (HUE). There is no evidence Iran has either created the cascade of high-speed centrifuges necessary to produce HUE or that Iran has diverted any of the low-enriched uranium from Natanz. And the International Atomic Energy Agency inspectors retain full access to Natanz. And rather than accelerating production of low-enriched uranium, only 4,000 of the Natanz centrifuges are operating. Some 1,000 are idle. Why? Dr. Mohamed El-Baradei, head of the IAEA, believes this is a signal that Tehran wishes to negotiate with the United States, but without yielding any of its rights to enrich uranium and operate nuclear power plants.
Maureen Greenbaum

College is a waste of time - CNN.com - 49 views

www.cnn.com/...index.html

college skills

shared by Maureen Greenbaum on 03 Jun 11 - No Cached
    • Brian Mull
      Brian Mull on 03 Jun 11
       
      Marketing oneself in society today is a skill that all students MUST have, but too many schools are ignoring.
  • Of course, some people want a formal education. I do not think everyone should leave college, but I challenge my peers to consider the opportunity cost of going to class. If you want to be a doctor, going to medical school is a wise choice. I do not recommend keeping cadavers in your garage. On the other hand, what else could you do during your next 50-minute class? How many e-mails could you answer? How many lines of code could you write?
    • Brian Mull
      Brian Mull on 03 Jun 11
       
      The key is balance. We don't need to throw the baby out with the bathwater. What we need is to construct learning environments and experiences that connect with the real world. NOt the world within the school's four walls.
  • ...10 more annotations...
    • Brian Mull
      Brian Mull on 03 Jun 11
       
      People who are successful in this area have a drive to be successful. We need to meet our students where they are, and we need to construct learning experiences in a way that engages their passions and promotes this drive. Schools and teachers can do this, but school and classroom structures need to change. 
    • Brian Mull
      Brian Mull on 03 Jun 11
       
      I rather think of this as many schools are failing to give students the skills they need to empower themselves. We can't take the responsibility away of students empowering themselves. It's a small, but vital thinking shift.
  • I left college two months ago because it rewards conformity rather than independence, competition rather than collaboration, regurgitation rather than learning and theory rather than application. Our creativity, innovation and curiosity are schooled out of us.
  • Failure is punished instead of seen as a learning opportunity.
  • college as a stepping-stone to success rather than a means to gain knowledge. College fails to empower us with the skills necessary to become productive members of today's global entrepreneurial economy.
  • 36% of college graduates showed no improvement in critical thinking, complex reasoning or writing after four years of college.
  • Learning by doing
  • A major function of college is to signal to potential employers that one is qualified to work. The Internet is replacing this signaling function.
  • creating personal portfolios to showcase their talent.
  • document our accomplishments, and have them socially validated with tools such as LinkedIn
Carla Wimmersberger

Learning. Your time starts… now! | Betchablog - 47 views

chrisbetcher.com/...learning-your-time-starts-now

shared by Carla Wimmersberger on 13 Apr 11 - No Cached
  • If you accept that Learning is a Conversation, and that some of the most powerful learning can take place in the process of conversing and exchanging ideas with others, then setting up ways to have as many of these conversations as possible seems like an obvious thing to do.
  • It might be easy to think that the people on the stage at conferences have the knowledge and that if we simply listen to them we will get wisdom, but the truth is that sometimes it just doesn't work like that, and even if it does, most of those ideas gather far more momentum once we start to internalise them through further conversation with others. Ideas beget ideas, one thing leads to another, and you often find some of the best, most useful ideas come to you not from what was said by a speaker, but from things that came to to you as a result of further conversation about what was said.  (by the way, the same logic applies in classrooms too!)
  • If we limit our notion of learning to the "official" channel - the teacher, the textbook, the syllabus - we miss so much. Yes, learning happens at school, but what about outside school? Yes, learning happens in the classroom, but what about outside the classroom? Yes, learning happens in the act of "being taught", but what about when we are not "being taught"?
  • ...8 more annotations...
  • Our schools system implies that when we ring the bell to signal the start of a class, we are really saying that the learning starts... wait for it... now!  And at the end of the lesson we ring it again to say the learning now stops. Ok, school's over, you can all stop learning now. Until tomorrow.
  • if we acknowledge that creativity in education is important, then how can we teach kids to be creative if we continue to focus on just regurgitating standard answers to standard questions, year after year. Because if it's only about learning pre-defined content then you don't need creativity, and you don't need conversation. Learning in messy and there is no point extending our thinking into new and creative areas if we aren't committed to that notion, because that just muddies up all those nice clean facts we have to remember.
  • Papert said that the one really valuable skill for a 21st century learner is that of being able to "learn to learn"... To be able not just to know the answers to what you were taught in school, but to know how to find the answers to those things you were not taught in school.
  • So how do virtual communities fit into this? They are an obvious and convenient way of extending conversations with other likeminded people, no matter where (or when) in the world they might be.
  • Unfor
  • If you accept that Learning is a Conversation , and that some of the most powerful learning can take place in the process of conversing and exchanging ideas with others, then setting up ways to have as many of these conversations as possible seems like an obvious thing to do.
  • If we limit our notion of learning to the "official" channel - the teacher, the textbook, the syllabus - we miss so much. Yes, learning happens at school, but what about outside school? Yes, learning happens in the classroom, but what about outside the classroom? Yes, learning happens in the act of "being taught", but what about when we are not "being taught"?  Our schools system implies that when we ring the bell to signal the start of a class, we are really saying that the learning starts... wait for it... now!   And at the end of the lesson we ring it again to say the learning now stops. Ok, school's over, you can all stop learning now. Until tomorrow.
  •  if we acknowledge that creativity in education is important, then how can we teach kids to be creative if we continue to focus on just regurgitating standard answers to standard questions, year after year. Because if it's only about learning pre-defined content then you don't need creativity, and you don't need conversation. Learning in messy and there is no point extending our thinking into new and creative areas if we aren't committed to that notion, because that just muddies up all those nice clean facts we have to remember.
Martin Burrett

Current Affairs in the Classroom - 11 views

ukedchat.com/...rrent-affairs-in-the-classroom

news current affairs

shared by Martin Burrett on 12 Jul 18 - No Cached
  • Martin Burrett on 12 Jul 18
     
    "The world is changing and that is nothing new. To quote a great prophet, "It was always burning, since the world's been turning." But the rate of change coupled with the explosion of data and media means that information from and about the world around us has turned from a manageable stream to a continual barraging flood. We can either give our pupils the skills to set up a self-sustaining hermitage in a mobile signal black spot, or we can provide them with the managed explosure and then skills to assess and deal with what is being hurled at them."
Martin Burrett

Timeblocks - 15 views

ukedchat.com/...timeblocks

timer time lesson pace

shared by Martin Burrett on 21 Nov 18 - No Cached
  • Martin Burrett on 21 Nov 18
     
    "Simple online timer where the user can add sequentially labelled timers which could be used to signal transition from one activity to another, or better yet, making sure you leave your staff meeting on time!"
Martin Burrett

Plagiarism checker @Urkund creates fast analytical check for educators - 18 views

ukedchat.com/urkund

plagiarism

shared by Martin Burrett on 23 May 19 - No Cached
  • Martin Burrett on 23 May 19
     
    "Towards the end of the academic year, it is time for many students to hand in their long-awaited assignments, signalling the end of another semester of inspiring teaching and learning. For their teachers, being faced with a collection of essays can seem overwhelming and being able to check the originality and authenticity of each one could take a considerable amount of time."
Martin Burrett

SETI Live - 49 views

setilive.org

citizen science space alien science

shared by Martin Burrett on 14 Mar 12 - No Cached
  • Martin Burrett on 14 Mar 12
     
    A great site for citizen science. Get your class to watch for signals from space with the SETI project. Who will you find? http://ictmagic.wikispaces.com/Science
Martin Burrett

The Positive Power of Negative Thinking - 16 views

ukedchat.com/...sitive-power-negative-thinking

thinking

shared by Martin Burrett on 11 Dec 17 - No Cached
  • Martin Burrett on 11 Dec 17
     
    "Fads in education come and go, with many settings being full of optimism, hope, and trying to instil a positive mindset among their pupils. Yet, all these positive, happy signals sometimes fall short of providing individuals the skills to think more critically within the world they engage in. Many people believe that thinking negatively is a bad thing, and do not consider it as a positive force for good. Expecting things to go wrong can be a great force for good, and with grades and expectations in schools set very high, what happens when things don't go to plan? People are completely stuffed. If exams scores do not reach expected levels, then deciding on a college, university, or vocational options can throw individuals off-course, but having considered the negative outcome options can provide a backup plan of which they still have some control."
Martin Burrett

Classroom Music by @rondelle10_b - 5 views

ukedchat.com/...classroom-music

music classroom

shared by Martin Burrett on 28 Dec 17 - No Cached
  • Martin Burrett on 28 Dec 17
     
    "I loved reading @thatboycanteach's blog this morning about music and his classroom-based Youtube battles with a former colleague. It got me thinking about how I use music within my lessons. To jolly my Y8 students along, I play 3 minutes of Bennie Hill's theme music as a signal that they should clear away practical equipment and return to their seats. It's great to see the startled look on their faces as soon as they hear the tune and then remember that they need to completely pack away before the music ends."
Martin Burrett

Cognitive Load Theory - UKEdChat - 6 views

ukedchat.com/...cognitive-load-theory-2

cognitive cognitive load theory

shared by Martin Burrett on 22 Oct 20 - No Cached
  • Martin Burrett on 22 Oct 20
     
    We all get overloaded from time to time, especially toward the end of a term when your todo list turns from being measured by points to metres. We all have our own capacity to deal with the issues at hand, and the ideas behind Cognitive Load Theory (CLT) attempt to maximise our bandwidth while streamlining the signals. The origins of the theory go back to the 1980s when a plethora of digital innovations changed how presentations were done in the business world. This trickled down in the following decades into how teachers presented ideas, moving away from blackboard and Over-Head Projectors to digitalised PowerPoint presentations. As with any new innovation, form overcame function, and for a period in the early noughties, I swear it must have been the law to cram as many animations and sound effects into every PowerPoint, and reading every word from the screen aloud was mandatory.
Lisa C. Hurst

Inside the School Silicon Valley Thinks Will Save Education | WIRED - 10 views

www.wired.com/altschool

shared by Lisa C. Hurst on 05 May 15 - No Cached
  • Lisa C. Hurst on 05 May 15
     
    "AUTHOR: ISSIE LAPOWSKY. ISSIE LAPOWSKY DATE OF PUBLICATION: 05.04.15. 05.04.15 TIME OF PUBLICATION: 7:00 AM. 7:00 AM INSIDE THE SCHOOL SILICON VALLEY THINKS WILL SAVE EDUCATION Click to Open Overlay Gallery Students in the youngest class at the Fort Mason AltSchool help their teacher, Jennifer Aguilar, compile a list of what they know and what they want to know about butterflies. CHRISTIE HEMM KLOK/WIRED SO YOU'RE A parent, thinking about sending your 7-year-old to this rogue startup of a school you heard about from your friend's neighbor's sister. It's prospective parent information day, and you make the trek to San Francisco's South of Market neighborhood. You walk up to the second floor of the school, file into a glass-walled conference room overlooking a classroom, and take a seat alongside dozens of other parents who, like you, feel that public schools-with their endless bubble-filled tests, 38-kid classrooms, and antiquated approach to learning-just aren't cutting it. At the same time, you're thinking: this school is kind of weird. On one side of the glass is a cheery little scene, with two teachers leading two different middle school lessons on opposite ends of the room. But on the other side is something altogether unusual: an airy and open office with vaulted ceilings, sunlight streaming onto low-slung couches, and rows of hoodie-wearing employees typing away on their computers while munching on free snacks from the kitchen. And while you can't quite be sure, you think that might be a robot on wheels roaming about. Then there's the guy who's standing at the front of the conference room, the school's founder. Dressed in the San Francisco standard issue t-shirt and jeans, he's unlike any school administrator you've ever met. But the more he talks about how this school uses technology to enhance and individualize education, the more you start to like what he has to say. And so, if you are truly fed up with the school stat
Will Richardson

2009 Horizon Report » Key Trends - 0 views

wp.nmc.org/...trends

shared by Will Richardson on 26 Jan 09 - Cached
  • Increasingly, those who use technology in ways that expand their global connections are more likely to advance, while those who do not will find themselves on the sidelines.
    • Adrienne Michetti
      Adrienne Michetti on 26 Jan 09
       
      Does this spell things out for teachers who are not willing to embrace these technologies?
    • Will Richardson
      Will Richardson on 26 Jan 09
       
      I would love to see some research to support this. It's a nice soundbite, but what it is based on?
  • The notions of collective intelligence and mass amateurization are redefining scholarship as we grapple with issues of top-down control and grassroots scholarship.
    • Adrienne Michetti
      Adrienne Michetti on 26 Jan 09
       
      The community is changing the learning process.
  • opportunity for increased social interaction and civic engagement among this group. The success of game-based learning strategies owes to active participation and interaction being at the center of the experience, and signals that current educational methods are not engaging students enough.
    • Adrienne Michetti
      Adrienne Michetti on 26 Jan 09
       
      But the question is, how can these gaming communities offer more opportunities for LEARNING? I think currently, many of them exist for entertainment. A shift needs to happen.
  • ...3 more annotations...
  • visual literacy will become an increasingly important skill
  • Visual literacy must be formally taught,
    • Adrienne Michetti
      Adrienne Michetti on 26 Jan 09
       
      visual literacy IS formally taught in English language arts classrooms (it is one of the strands) AND in Art classes. Aren't all students taking these courses???
  • Increasingly, those who use technology in ways that expand their global connections are more likely to advance, while those who do not will find themselves on the sidelines.
  • Sandy Kennedy on 26 Jan 09
     
    Shared by Wes Fryer addresses gaming, colaboration, crowd wisdom, social interaction, etc
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